Was i cheating on him or is he just disillusion?

how does the other guy your dating feel about it or does he too think that your exclusive just to him?I think all relationships last with open Communication, does dating or seeing more than one guy at a time help your self esteem? I think that before you went out with this guy you should have told him you were dating someone else, then he would have had the choice to either ask you out anyway or moved on because he wants a one on one dating relationship. So you need to be up front with men if your already seeing someone else.