I just barely caught up on BDBs stuff.
Interesting timing because our very good friends are getting divorced. In fact, they have been separated since October. We have been in the same ward for 8 years, we started a company together, and started our families about the same time (before you ask, NO, our wives did not have a Pregnancy Pact like the kids in Massachusetts).
Anyway, it is a really tough spot because I am still friends with the husband AND the wife, but she likes to vent to my wife all the time. She divulges info and complains a lot about a guy that I am still friends with, etc. On the other hand, she also is our friend and has legitimate concerns.
The only reason I bring this up is because she is also very needy. She calls my wife all the time, late at night, whenever. She usually just wants to talk (no demands for visits), but she has often asked me for blessings...over and over. She also likes to ask me if I know any info. It can be tough "being there" for the needy.
I can only imagine how horrible it would be to get divorced, so you are wise for being patient with your friend.
That being said, as goat pointed out, you cannot get into unhealthy relationships, and it sounds like this woman may be poisoning the well a bit. If she is jading you or making it harder for you to pursue relationships that would otherwise interest you, then limit your interaction.
Have fun, date whomever you want, and do what feels right.
I do feel bad for your divorced friend, though. Seriously, I would probably become clinically depressed if my wife or kids were not in my life. I would have to think that I would be pretty emotional or needy if I went through that.
Fortunately, my wife and I never legally married, so no way she can ever divorce me. sucka!