I’m I obsessed or…

So I like this girl in my class. I've liked her for a couple years now but recently it hit me hard (probably puberty) A couple months ago I told her that I liked her but she very kindly and respectfully rejected me. We're still friends and we talk almost every day but I can't stop thinking about her. She hasn't shown any sign of interest in me, or anybody really. I just don't know what I should do. She's to cute for me to just give up on. What do y'all think?