A couple weeks ago, a girl that is my friend and that I like pointed out that I have a "thing" for short girls. I think it's true because I have a crush on about 7 or 8 girls in my grade(7th Grade), 3 girls in 6th grade, and a couple girls in the elementary. Does that make me a bad person or a pedophile?

But it seems you're too young to be on this site.
If you were old enough to be on this site, it would make you a paedophile.