Chances are if your friend is choosing the same uni purley to hang around with you she's in for a shock. She'll probably realise things don't work that way and although it sounds horrible if she isn't there to do some work i'd be surprised if she gets through her first year...
Just tell her you don't like her and don't like the idea of her picking the same uni as you. You only have a few more months at school together so it doesn't matter if she hates you.
What are you 'she's in for a shock' people on about? I never understood this over-dramatizing of University life, it would be perfectly easy to go to University with your existing friends and remain that way.
well one of my friends had this problem with someone else, and she lied to her friend when accepting choice, said she ahd accepted offers from somewhere else when she hadn't really, in a bid to get the friend to put something else down as their first choice. When it gets to results day, you can say you changed your mind and asked the uni you want to go to to see if there were places at clearing, and you got in that way.
I'm not saying it's the student way and that you WILL drift apart from friends.
But the OP's friend is causing strain on the friendship by being so clingy. If you're chilled out about it, you'll probably stay friends. But the OP will resent the friendship if she carries on in such a clingy way. So I reckon that they're far more likely to drift apart.
Of course it isn't a certainty that you'll never see your friends again, far from it. but this situation can only make it more likely. Like I said, I was put in a similar position. We ended up drifting apart even before the getting to uni stage. Her behaviour beforehand was the main factor, in my eyes. Maybe I was being self centred in thinking she was copying me. But either way, whether it was my paranoia/big headedness, or her decision to copy my every academic move, we aren't very good friends any more.
Don't think you really need to worry. I go to the same uni as one of my friends, i was a little concerned at first, sometimes its nice to have a clean break, but its never been a problem, to be honest its a bonus to have a friend from before around sometimes. Uni really is a big place, i lived 50yards from my mate but if i wanted to i could avoid him quite easily. One of my housemates's best friends lived 50 yards away, yet she hardly saw her, not intentionally, just everyone makes their own friends and does their stuff. Even if u go to uni wanting to hang out loads it probably wont happen, and if u want a bit of space it wont be very hard to find it, may as well say nothing and stay friends imo.