I'm 16 and I like a girl who is 13, here is what has happened so far, what should I do?

i mean its only three years that's not THAT bad at all, i would also try to tell her father your intentions because being a girl i know that a girl is always daddy's little girl and no matter what boy comes around he is always going to be defensive about her. I would ask her out and talk to him. She obviously likes you a lot. so i would def. go for it !