1.May you live long and prosper cousin, and may you never own a red shirt. Happy birthday you trekkie you!
2.My childhood memories with you are priceless. I don’t just have a cousin, I have a life-long friend. Happy birthday!
3.You may have become a year older and wiser, but always remember that I’m still smarter than you! Happy birthday cousin.
4.You bring such glee into not just mine, but our family’s lives. May your deepest wishes and dreams come true this year. Happy birthday cousin!
5.Your joy and zest for life inspire me to strive to be a better person. May your birthday be filled with wonder and awe. Happy birthday cousin!
6.Happy birthday to the sweetest, most adorable cousin in the world. I hope your birthday is filled with sugar, spice, and all things nice just like you.
7.I am convinced I have the best cousin in the world, and I hope the feeling is mutual. From one phenomenal cousin to another I wish you a happy birthday!
8.I am so lucky I have a cousin like you. You are someone I can always rely on, and I hope your birthday is filled with joy, love, and laughter.
9.I hope you have a birthday as epic as the day you were born. As I hear it, it was pretty darn epic. Stay classy, cool, and amazing this year cousin.
10.As your cousin it’s my duty to wish you happy birthday and remind you that you’re getting old. Really, really, really old, but I still love you anyway.
11.Your presence in my life is a source of wonder and happiness. I’m so glad to be even a small part of your life. Have a spectacular birthday cousin!
12.Some wisdom for my favorite cousin: Don’t dwell on the dimness of the past, but instead press on for your future is incredibly bright. Happy birthday!
13.You help make life worth living and dreams worth dreaming. Wishing you all the very best on your birthday cousin.
14.As you become another year older I don’t want you to worry. It will always be my job to annoy you no matter how old we get. Happy birthday cousin!
15.I am so lucky I have a cousin like you: one who inspires greatness. I hope your year is filled with happiness, love, and exciting exploits. Happy birthday cousin!
16.Congrats on being an awesome human being. You are the epitome of amazing. Even Daria would think you were cool. Happy birthday you misanthrope you!
17.Happy birthday to my awesome cousin who has caused mayhem since the day they were born. May you continue to do so for many years to come.
18.I’m so glad that I have had a cousin like you to help guide and support me. I’m even more glad that now I’m finally taller than you! Happy birthday shorty.
19.Happy birthday to someone who was always stuck being the Robin to my Batman. You will always be my favorite sidekick in life.
20.I wish you happiness as big as the ocean today. Thank you for being not only a sweet cousin but a great friend as well. I hope you have a spectacular birthday.
21.When you make your birthday wish keep in mind that sometimes dreams really do come true. I ended up with a cousin as kind and caring as you. Happy birthday cousin!
22.Today is all about you cousin. You are a superstar, superhero, and super boss. Basically, you are amazing, and I hope every dream you wish will come true. Happy birthday!
23.Cousins are a little slice of childhood. I’m grateful I had you in my life to love, cherish, and annoy. Happy birthday!
24.I have loved to disturb you, worry you, and more importantly annoy you. However, my favorite thing is to simply love you. Happy birthday to the world’s best cousin.
25.Thank you for always forgiving me. It’s such a simple thing, but it says so much about you as a person. Happy birthday to the coolest cousin there is!
26.Happy birthday to the person who knows firsthand what it was like growing up in our family. I must say I think we only came out slightly crazy. Happy birthday cousin!
27.Your cake has so many candles that it’s become a fire hazard. Mwahaha. I meant congrats on getting older cousin!
28.Cousins always know when to hold you and more importantly when to challenge you. Thanks for helping me grow as a person even when I didn’t want to. Happy birthday cousin!
29.Happy birthday to my partner in crime. For every fun exploit you were always right beside me. Thanks for making life an adventure worth having.
30.I wish you the very best on your special day, not just today, but for every day for the rest of the year as well. If anyone deserves it, it’s you. Happy birthday!
31.The bond of family is stronger than any argument or fight we’ve been through. I hope to continue to be a part of every journey you go through in life. Happy birthday!
32.Dear cousin, I knew I loved you since the day you were born. I’m so proud of all you’ve done so far in your life, but I’m even prouder of who you’ve become. Happy birthday!
33.I hope you set the world ablaze with your dreams and aspirations. If so, you can use the flames to light all those birthday candles on your cake cousin. Happy birthday!
34.Happy birthday to the coolest cousin I know. I may only have one but who needs more when they have you? Just know that you’re my family by blood but my friend by choice.
35.I’ve watched you grow over the years and I couldn’t be prouder of the young man you have become. Today I am wishing you many more birthdays filled with endless love and laughter.
36.Thanks for always setting the bar so high that my achievements have paled in comparison. I still love you. I just also hate you a little too. Happy birthday cousin!
37.I can’t count how many times you have brought a smile to my face and laughter into my life. I hope your birthday is as wonderful as you are.
38.I am so grateful to have you in my life. I can never forget how blessed and fortunate I am to have a cousin like you. I hope your birthday is filled with joy and cheer.
39.I love you is such a small and simple phrase, but it carries the depth of my feelings for you. I hope you feel the sincerity in my words, because I truly mean it. Happy birthday!
40.You are such a wonderful reminder of all that makes life good and whole. Happy birthday to my cousin that shines brighter than the sun. May you get tons of presents and food on your birthday!
41.I know being related to me is really the only birthday gift you need, but just in case I also brought you cake and wine. You’re welcome.
42.When we were little you shared your toys, and as we’ve gotten older you’ve shared your heart. Thanks for always being someone I can confide in. I love you and happy birthday cousin!
43.Growing up with a cousin like you has been the best type of adventure. I’ve loved every crazy, stupid, and exciting moment spent with you. I hope your birthday is delightful.
44.You are the perfect example of family. Your fearlessness inspires me, your determination challenges me, and more importantly your love supports and surrounds me. Happy birthday!
45.I hope that this year you wake up with a smile on your face every single day. At least I know you will tomorrow, because I got you the best birthday gift ever. Cake. Happy birthday cousin!
46.For all the years you ratted me out to my parents I forgive you, because it’s your birthday. Also, I may have ratted you out to your parents a couple times too.
47.Thanks for all the things you’ve done for me. I can’t even count all the ways that you’ve been there for me. I am deeply touched and immensely grateful to you cousin. Happy birthday!
48.Even through our many fights you have been patient and kind. I am really lucky that I have a cousin as loving as you. This birthday I hope you receive all the joy your heart can hold.