First, I don't think jealousy is an irrational emotion. The reason we are jealous can be irrational, but sometimes jealousy is the only rational response.

I'd like to know the back story. How'd you meet the guy? Did you know him before your hubby?

I agree with whomever said you should invite him to spend time with you and your husband. I think a lot of men think men can't just 'be friends' with women, and are suspicious of any man who claims they can. Maybe they can connect one on one and your husband can learn to trust the guy.

Karen