First lets take it out of this negative frame and put it in plain terms. Your boy friend is seeking something( and I will get to this in a second) out side of your relationship. The reason for this is that if you call it cheating you will find your self in a victim role and not be able to take a clear course of action.
1. Feels lonely and is seeking some attention. (is looking for more emotional intimacy)
2. Separates sex from love and has a sexual appetite he can not fulfill at home.
3. Is mad at you because he perceives himself rejected in some way by you.
If you don't take your boy friends behavior just personally you will be able to open up a dialog to greater understanding and mutual choice making.
Take the time to consider how your relationship is going and see if you and your are bringing the best to it!
Many blessings,
Dr. Eric!
