Lose the guilt, this was a joint venture and maybe you did cross the line, but its done. Back away and see what happens when next you meet.
Most times friends in this situation after consideration, just act like it never happened.
Don't assume facts that aren't there, since you don't know how she feels yet, but don't push.
This is a wait and see thing, but do carry on with your life, and be careful around alcohol.
Maybe that's the whole point behind this adventure, watch your drinking in the future.