On your birthday, today marks the beginning of a new year and the conclusion of an old one. I can’t wait to be with you through many more chapters as your cousin and your friend.

There’s also “Cousin by blood, friends by choice,” from Darlene Shaw. We’ve got you covered if you’re looking for just the right way to wish your cousin a happy birthday.

4. Wishing a happy birthday to the cousin who still thinks "adulting" is a mythical creature. May your day be as carefree and fun as the times we spent avoiding responsibilities together. 5.