Sorry you had to wait for a response.
No, I would not say to give up on someone because she is diagnosed with bipolar. It is a very treatable disorder and she's doing the right thing by going to a day treatment center.
She will need your friendship, but I'm concerned that because she can't commit to a relationship right now (and really, that's a smart decision on her part given her situation) you dealt with the pain of hearing that with self-destructive behavior..(going back to smoking , a "60 hour drunken stupor")
If you in fact love this girl, you're going to have to be in good shape yourself to support her through the challenge of adjusting to having a new diagnosis, adjusting to her parent's divorce, and finishing the work of healing from the ex-boyfriend.
If she is in daily treatment and working on her personal growth you'll need to keep up with her growth in self-awareness.
Persons with bipolar disorder have impulse control issues--which would explain her kissing you even though she knew it was a bad idea. You're going to have to be very solid in your self-esteem and commitment to her to be able to handle the mood swings and impulsiveness that are somewhat inevitable.
I know this was a painful shock for her to break off the relationship for the time being. If this is the girl you want to be with for the long haul, you're going to have to exhibit patience, commitment, and self-restraint. She's going to need someone really solid to depend on. If you want to be the one she turns to when she's eventually ready, you need to be doing your own growth work. Study up on bipolar disorder so you know what she's having to deal with.
Do whatever is necessary to deal with the pain of the change in your relationship---in a healthy way. You might even want to see a counselor yourself to help support you through this time. It's one thing to say you'll do whatever she wants, but it may not be so easy to really do it, especially if what she wants is to be single for awhile. You're going to have frustrations and pain to deal with. If you're open to getting yourself some support through the rough time ahead, here's a link to help you find a therapist in your area.
And here are some links about bipolar disorder: http://www.mayoclinic.com/health/bipolar-disorder/DS00356/DSECTION=symptoms
And this last link is about having a relationship with a person with bipolar disorder: http://www.webmd.com/bipolar-disorder/guide/bipolar-romantic-relationships-dating-and-marriage
I admire your determination to stand by your girlfriend through this rough time!