This is JUST MY thoughts at the moment, but sounds like you are very co-dependent and your happiness is centered your husband. When I was in the kind of mind set I'm picking up in your words...the last thing I wanted to do was be out with my man where there might be girls that could cause his eyes to stray.
And it may be possible that you could be dealing with some depression type things - just a guess - or possibly borderline personality dissorder.
Doesn't sound like SAD to me though because in your case it's not because of anxiety, but rather just not wanting to be around other people.
Hope you don't think me too harsh for being this blunt....just letting you know what I see when reading your post.
Hugs,
Jenna