Never thought I could hurt this way.

So I went to get on our computer and apparently my husband drank too much last night and left his game open. There is a message on there too a girl I have told him makes me uncomfortable that he talks to her saying hey beautiful. Am I wrong to be hurt and angry? I don't even know how to confront him about this. He cheated on me once when we first got together but that was over six years ago. I have forgiven but not forgotten so needless to say I have some self conscious issues.