Her asking about you doesn't mean that she wants you back but can simply means that she ask about you because she just wants to know how your doing.
Sometimes when you do someone wrong no matter what you say can make that person overcome what you did and it's almost like reopening a wound and I pretty sure you messed her up and damage her trust for the next guy.
The only you can do at this point is learn from it and don't repeat the same misery for the next person in your life. It's not uncommon to feel the way you especiallly since you was in the wrong. Guilt is eating you up inside but you have to deal with it because you made the bed and have to deal with it. The curtains are closed. So move past it and don't, I mean don't, repeat the same mistake in future and value a good woman when you have one because believe it or not but we are a dime a dozen and regardless at what you throw at us we stay strong.