So, to put things chronologically, he lost interest in you, 7 weeks later you have surgery and can't have sex anymore due to surgery. Is this only for a certain time, or is this permanent? What part of sex is made impossible?
Because when my girlfriend is having her period she usually still wants to have sex (we don't see each other often, so our sex drives are usually running red hot when we meet). What we do is; We have foreplay and I .. well I make love to her legs. She presses them together and I place my penis in between, at the top. This creates a very nice sensation for me, and a not unpleasant sensation for her. You might want to try it. Of course, it's not even remotely as good for "her" as it is for "him", but it is a lot more intimate than a ******* or any other type of foreplay. Is this an option for you?
Your husbands age? is he on any medications? is he a diabetic ? we need some more information please