At an absolute minimum he showed very poor judgement.

I’m a little surprised that he has met this “recent” friend four of five times already when she lives in another country. How did they meet?

I wonder if they arranged in advance to be in that city at the same time.

I agree that the faces together, arms around each other, the grossly excessive alcohol, the going to events and hanging out together as a couple are all highly inappropriate under the circumstances.

His angry defensiveness may or may not indicate that he feels guilty, but regardless of that is also an unwelcome behavior. Normally can you speak with him about something difficult, or does he typically resort to angry defensiveness?