I recently found out that the man I've been sleeping with was sleeping with another women. I cursed him out. Maybe I had no right to do so because there was no formal commitment between us. Still in all I felt that he should have had enough respect for me to tell me that this was what he was doing. I apologized for the hateful things I said and he forgave me and said he would be in touch soon. I need to know how I can bring this topic up to find out if this other person is still in the picture. I would like to know only to make a better informed decision on whether to continue seeing him.