I'm in this situation, and am making plans to leave my husband as I just can't face the rest of my life with no sex. He knows I'm unhappy with the situation, we've spoken about it a few times, and last time he admitted he just didn't think about the lack of sex as its not a priority for him. He was really up for it when we got together, but high blood pressure, weight gain, long working hours etc have put paid to that.
I would be patient if it seemed like he wanted to do something about it but I refuse to have to start nagging/cajoling him into exercising, eating better, seeing his doctor for advice, if he can't do it off his own back. It has totally ruined our marriage. We're not a partnership now, just two people living in the same house with no glue to keep our relationship alive. The resentment I feel towards him is immense. He has made me feel undesirable, worthless and dried up, until I decided I had to do something aboutnit myself.
I have been with a few different men sexually in the last 18 months, and don't feel a shred of guilt, which is surely the biggest sign that the marriage is over. I just don't see how he has any right to be upset or angry about me getting something from otherpeople that he has no interest in having with me. Saying that, I know I can't do this indefinitely, and it's not great for my peace of mind to do it much more, but it has been a lifesaver for me. I'm a very sexual person, and I can honestly say (and I will tell him this when it all comes out) that if I had known it would be like this a few years down the line I never would have married him.
I really do feel for you, OP. It's no way to live :(