I can't believe im a guy and doing this but i mistakenly came across this site. 

Dear crush,

You are the most beautiful  girl i have ever seen in my life. You may be 15 but you have the cutest baby face in the world. When you smile I want to smile even for no reason.  Just talk to me, Dammit you drive me crazy! Sometimes I think you like me but then you ignore me. I wanna curl up with you and keep you warm in the winter. I wanna be in a spoon position with you. I wanna kiss you, I wanna laugh with you, I wanna watch movies with you. Come on talk to me.  You are the definition of a crush! cuz you crush me but i still wanna be with you but then you are my friend's sister. Dammit!