How do I get rid of this girl?

I think if you really don't like her, even though it sounds like she really likes you, you should tell her. Don't be harsh about though. You could lower her self esteem and that's no good. Be a man about it and tell her that you you don't see her and you ever happening. Tell her theres nothing wrong with her, but your not ready for a girlfriend, that your in collage and you want to have fun.

if her texts are annoying you, and you dont want to talk to her then why do you text back in the first place? logic would tell you not to respond.

Have you ever seen the TV show Dexter?

Send her a text that says, oh sorry I didn't return your message, I was busy with "insert random girl's name" in my room.

That should do it.

People just want what they can't have - come on to her and she will think she's got you and lose interest.

I'd be up front about it.