OK! I am back!! Sunday morning golf with 4 hours of sleep!! Wasn't pretty!! I see you have been given great advice while I was gone. Toots is correct, posting to others helps draw them to your thread. Even just a simple message works. I don't do enough of that myself.
I can see you are paying way to much attention to H in my opinion. I think azzork asked the perfect question, are you OK with your H sleeping with another woman? Being unhappy in your marriage does not make it OK. To me there are steps to take when people are unhappy. Finding out why, counseling, workshops and doing the work. Once you have tried everything and nothing works, than you start looking at separation and divorce. But you DON'T bring another person into it.
Your health is at risk. Are you willing to risk your health? Are you willing to share your husband? Are YOU ok with your situation?
Me:44 EXW 44 Wonderful Children M11, T14 BD 6/14 OM Confirmed Divorce Final 2/25/16 "It works if you work it!"