DISCLAIMER: I DIDNT SPELL CHECK AND I AM DRUNK SO NO COMPLAINING
Joanna,
When men cheat it has nothing to do with their spouse, and everything to do with the man. Some men can be with the most beutifiul, and kind women and will still cheat. So, dont worry I am sure your a 'kick ass' girlfriend and will sone find someone to share you matching bra and panties with.
My advice would be to give yourself time and continue being who you are, dont change just because of one bad creep. Its a cliche I know but I think its true.
Terry