Is jealously in a realtionship evidence of someone feeling cheated out of something ? A fear that it may happen or has someones behavior already been construed as cheating or not fulfilling an expectation of exclusiveness ?
Interesting question. By jealousy, do you mean, rip roaring insane, hurling accusations jealous, or just a mild discomfort?
I try not to be jealous, in general. It rears it's ugly head every so often, I suppose (the mild discomfort type). In general, I would think it's just being concerned about what you can't see and, for whatever reason, not feeling sure enough of the other person to know that whatever is going on, isn't taking anything away from you. It could also well be that the other person is doing things which make you question the relationship. That can spill into jealousy, I suppose.
I have one friend whom I think would define jealousy as being insecure.