I wanted to get something extraordinary and particularly special for a cousin who is more like a sister to me, but then I realized something: You already have all of that in me!
I hope your birthday is as wonderful and as meaningful as you are to me, my dear! Wishing a very happy birthday to you!
I want you to know that I look up to you as if you were my elder sister, cousin. It has nothing to do with age, only the fact that you look so much older than me!
If I had to give just one reason why you’re more like a sister to me than a cousin, it would be that growing up together you would annoy me just as much as any sister would!