I have been married close to 30 years but we haven't really felt like a couple for the last 10. We share a home but not a bed, not even for a minute. Still says she loves me and gives almost polite kisses when one of us leaves the house or at night before going to our separate rooms, but no embracing. Doesn't want to go out with me alone, with her friends when they have some got together where spouses are invited or to activities associated with either of our workplaces (Christmas parties, etc). So it's like we are broken up. We will separate for retirement. I am not sure we will divorce. She doesn't care about being in any relationship. I do, but would probably be okay with a separation agreement with the boilerplate:

live separate and apart, each from the other, as fully, completely and in the same manner and to the same extent as though they had never been married.