I don't really get your first statement.
We're in the same uni course, albeit final year, so stuck with her till May

We also share the same group of friends so now that's in a heap too. So ya, I got myself in a mess. I'm not going to let her make me lose my friends though, she's had enough control up till now.
I am however completely blanking her. Have told her to never contact me again, removed her from skype/phone/google chat and have unsubscribed on facebook so I never have to see another of her posts. She has to realise I'm not going to be her emotional crutch when she couldn't give a flying **** about me.
Thanks for the sensible words though guys and lady. I went out with my other main group of friends last night (was arranged before the above mess came to a head) and it really did help. I'm just really glad I didn't make the mistake of blanking other friends when a girl gets involved. About the only mistake in the book I didn't make, tbh!