I don't think you need to face not having sex for the rest of your life. And, I don't know, but is suspect it isn't your weight that is keeping him from wanting to have sex with you. I was married for a very long time (35 plus years) to a guy who really didn't care that much about sex. I was always thin, and tried to keep myself looking good. He never complained about my weight, or anything else about me. He was pretty much focused on work to the exclusion of me or anything else.
Long story short, he ended up having an affair with another woman, and we finally got divorced. But, I think that it wasn't me, or at least my role was not the major one, but it was him. Finally, I realized that he had been traumatized as a child (not abuse, but death of his father, etc.), and he never really grew up. Not saying that is the case in your marriage, but I'm pretty sure that was the cause of his issues. Fortunately for me, after the divorce I found another guy who finds me very attractive and sexy, and now that I'm in my 60's, I'm having way more sex than I ever had in my 20's, 30's, or 40's.
One thing I'd suggest is for you is to concentrate on yourself -- lose weight, etc. because you want to do it, not so that your husband will want you, etc. It is possible that once he sees how far you have come and how well you are doing he will decide to work on himself. If not, it is his loss. You will feel better about yourself, and probably even feel better physically.
I know is a struggle, but you are worth it.
| current weight: 113.5