I like this girl right, but she doesn't like me
She used to like me but maybe she thinks I'm boring
I try to talk to her and get to know her but she won't open up


####Edited this time but......................!!!

Stop wasting your time with someone that is not interested. Move on and find someone that is into you.

How old are you both?

Don't stress yourself that she may not feel the same attraction as you do, just back slowly away. Look around, and see there is someone else to be with.

I don't know what kind of music you listen to, but the song "When I Come Around" by Green Day has the lyrics "you can't come forcin' something if it's just not right." Maybe that's how she feels. You really can't force anyone to like you, you just find someone that automatically will when all you're doing is being yourself.