I don't know that I can add much that would improve on the reply Useless Me wrote. I guess the only other thing that occurs to me is to suggest that, assuming you both are committed to making your relationship last, perhaps your fiancé might also benefit from some 1:1 counseling, if he's not already receiving it. And then the two of you might benefit from some couples counseling. The situation you describe isn't going to just fade away. And, if you marry & don't deal with it, head-on, it could destroy your marriage over time. So, my suggestion (having been married for around 35 years) is get out in front of this now. And good luck to you both!!!