Well, i wouldnt blame this girl for what happened with my ex. I mean, its not like she pointed a pistol at her and forced her to cheat on her bf, she just introduced her to someone else. That doing that knowing she had a bf just because she was mad at her bf was a dick move? Yeah, its a dick move, what happened afterwards isnt her fault so, even if i would be somewhat mad at her, i wouldnt be mad enough to not help her.