Been in very very similar situations myself mate, I'm only 17 so it's a bit different cos I'm quite a bit younger than you but it's freaky when you get silly girls like this, scares the fuck out of you. My most recent fling was with a girl like this who was only interested in a relationship after I'd met her like 2 times (just like you mate). So we were 'going out' already before I even realised that she was a bloody psycho, I would've fucked her off if I got to know her more. She wanted to see me every day and stuff, after 2 weeks I was just really off with her all day when I went Alton Towers with her and a few mates and finished her by using the 'I can't give you what you give me, you deserve someone who thinks the world of you like you do me, I think we're better as friends in the long-term' sort of thing. Had a massive argument about a week after not speaking after she'd been chatting loads of shit about me to everyone and had the cheek to try and get back with me, silly little **** deleted me off facebook as well, LOL. Tried to re-add me but I don't want anything to do with the lying little woman and me and my mates have made that clear. Absolute fucking fruit, hope things work out for you similarly mate but perhaps with a bit less hassle afterwards :p