How to behave?

[saladin_79]

Me and my girlfriend share the same job (that's where we met) and  everything was going fine, when a workmate who also was a moviefreak, followed her home. They spent a few nights together watching films, and I was ok with that. We all were friends after all. I trusted them.

But one day she tells me, that this friend had put his arm around her, and tried to kiss her. She had refused of course, but what kind of pathetic excuse for human would do such a thing?

After my gf had told me, she sent him a message stating that they weren't friends anymore, just colleagues. And they never saw films together again.

But now on to the issue...


This guy doesn't know I know what he did. So how should I behave while we eat lunch together every day?

I cannot look him in the eyes. In there, I see only darkness. Actually I did that before as well, but now it is so personal. 

I'm passive at the table, listening while he talks to his other friend about films – and girls. He seem to have had quite many relationships. 

To me, he is nothing but a vermin. A filthy scum that needs to be contained. I just wanna expose him for what he is to everyone.

Or, could it be...

I am just a victim of my own imagination?

Whatever the case, how should I cope with my feelings?