I think its a really good sign that she's willing to change!

I think it would be a good idea for you two to focus on the things that you have in common. Maybe let her know that you are there to support her, but you can't handle only talking about her problems all of the time, and you want to focus on doing things together, enjoying each others company, discussing things that interest you both, etc.

Good luck!

PS You're a lot stronger than I am. I'm out the door at the first sign of a problem, but usually I'm the one who IS the problem, so yeah...