<human>: I know this kind of thing happens all the time, but it's never happened to me, so I'm not quite sure how to deal with it...

At a party last night, I drank a lot of alcohol (as usual), started talking to a girl I don't know who I found out is going to the same university as me studying a similar subject, and who I had seen before at a university interview. We got on pretty well, and one thing led to another and we were outside getting off/making out/whatever you call it where you're from. She said something about thinking that I wouldn't remember her in the morning, so I very cleverly decided to ask her out right there - not as in official boyfriend-girlfriend, but we just agreed that I would text her today and we would meet up.

All was well until this morning when I woke up realising that, as much as I like her as a person, I don't want to go out with her. Partly because I don't think we're right for each other, partly because I don't want a relationship right now - I'm in the middle of preparing for very important exams, and my only previous relationship was incredibly stressful and required a lot of time and effort, which was only made worthwhile as I *really* liked the girl I was dating.

I know I am entirely at fault here, and feel terrible about it, but I don't know how best to say to her that I want to break it off :( Could you help?

Can you condense the text into three sentences or less?
<bot>: Drunkenly asked someone out, woke up regretting it. How do I tell her that I don't want to date?