Wait she's an ex?I guess you're right about this but I'd feel like such a douchebag. I'll see how it goes. She seemed pretty psyched to be talking to me again even when we talked about what a dick I was when we went out.
I'm seeing her next week so it's probably not worth making a judgement until I get more of a gauge on how she feels about it
DON'T DO IT
And if you are going to do it, don't let either of you drink, else you'll end up with accusations of "he took advantage of me".
Just bail out of the whole thing, man. It's over.