If you truly want to go back then do it. Don't let her get the best of you. Remember three things:
!. Beauty is in the eye of the beholder. If you like your work that is what matters.
2. Misery wants company! Some people are only happy if others are miserable like them, don't feed into it.
And the important one:
3. You have a place that has people who care and will let you be yourself right here! Let loud mouth keep it up, sooner than later she will be all alone!