need feedback on my very first love letter

This is for my boyfriend on our six month anniversary coming up. We're 16 and 17, so still pretty young, and this is my first time ever writing a love letter. I would really appreciate any feedback. Here's what I have so far:

Dear (his name),

When we first met I made a list of things I liked about you so I could tell my friends that I had met a guy they would finally like. I said I liked your hair, the posters on your wall, and the way you spoke. I still love all these things, but I've spent the past year finding so many more things to love.

I'm obsessed with your smile. I love the way you pretend to laugh when my jokes aren't funny. I love that you play my CDs in your car even though you hate my music. I love that you watch every movie I recommend even when you know you won't like it. I love the way you think I'm pretty even when I've just woken up. I love that you come to my family dinners even when you know it'll end in my parents fighting. I love the little scar on your knuckle. I love every single one of your drawings. I love how much you've changed for the better in the short time we've known each other. I love that you're mine.

You are the single best person I know and I'm so beyond grateful to be in love with someone like you. You are kind, intelligent, and capable of amazing things. I've spent the last six months of our relationship in awe of how strong you are and have become. I love you