<human>: Okay this is hella weird but stay with me. I'm a freshman in college and as such have been making new friends and stuff. I met this girl who I thought was cute, so I spent some time chatting with her, texting, etc. And she told me she had a bf eventually so I still went forward with the intention to be friends, since I'm just as happy with  girl friends as I am with girlfriends. But she has started to really get on my fricking nerves. She complains 24/7 about EVERYTHING. She never listens to what I'm saying and goes on about herself (example= I must've brought up I was a twin at least five times when we were texting and talking  and yesterday it came up again and she was all shocked, "omg you're a twin??" etc. That was really hurtful since I had thought the conversation regarding siblings was actually a bonding moment for us, since her brother has autism just like mine does.) She fishes for compliments ("I'm not pretty at all",  etc when she knows she is, over and over). She also comes over to my dorm room and won't leave so I can do my effing homework and not fail out of college first semester! She just broke up with her bf the other day and messaged me "you're the only one who I don't hate right now." WTF, I've  known her for  two weeks!  Worst of all she learned I play viola and now she wants to come play my $600 instrument because she at one point played in middle school. I'm super protective of it, since it was a present from my parents who are not well off and had to really break the bank to buy it.  I've had it for five years now and am very interested in keeping it safe. Point is, I'm no longer interested at all in being friends with her. How do I tell her this politely, without coming off as an asshole?

Provide a brief overview of the text.
<bot>: This girl I know really wants to  be friends, but she's driving me crazy. What do I do to say no and not be a dick?