Well I can see why you are jealous, but remember your b/f may not have all the answers for you....so that may be why he seems like a "jerk"about it. You have to keep the jealousy feeling from getting the best of you, and give him your trust. In givin time your trust for him WILL be appreciated. Give yourself some credit also, yall are together and have been open about the relationship. Which is a good place to be.
