Has S ever agreed with you that a friendship with Swiss Miss might be inappropriate? As I recall, that's still a gulf between you left unresolved. If you do have counseling, which I hope would focus on the two of you, perhaps that question can be addressed, especially if it identifies underlying vulnerabilities in each of--perhaps his fear of being engulfed and yours of being abandoned.
In any case, it's a potent issue definitely best handled with a competent T.
S does seem to be committed to you, Jen, and don't forget that. HE came back to have the giggle session with you, and HE was worried you had changed your ticket.