Is it weird that ive never had a gf yet when a girl said she rly liked me, i said no?

The exact same thing happened to me. Except I'm a girl and I'm in 10th grade. You shouldn't go out with just any girl who asks you, then what kind of relationship is that? That's what I've been told and I completely agree with it. You should talk to this girl that you like and just ask her out. :)