Starr - I don't know you or anything , so no offence - but you are coming across as a bit of a bunny-boiler here.

What's all this 'be there for her' supportive psychobabble bullshit all about?

The guy had a girlfriend. She wants someone else. Life is a bitch. Get out with dignity intact (and SOBO, you've failed mate) Get over it. Move on.