It can make a partner feel inadequate to hear that someone else "gets" a major part of your life, especially something that they have to deal with on a regular basis and that affects your relationship, much better than they ever could.

Good point. I wasn't thinking about it like this and I imagine it has to be difficult for him. I don't want to hurt him or disrespect him so I'll probably drop the subject and stop hanging out with my friend. I might switch to the group that meets on another night to make it less awkward too.

Second, I'll say that I honestly don't think hanging out alone with someone who's in group therapy with you is a good idea. Every therapy group I've ever been a part of has explicitly said that the members shouldn't become friends outside of the group at least while group is going on because it can lead to difficulty within the group - you may begin to feel less comfortable being honest in group if this guy is interacting with your husband outside of group.

Our group doesn't have rules like that but you make a good point and I can see how our friendship could become a problem. I don't want to make anyone else in the group uncomfortable.