I also went through the process in which some of my friends who didn't have the patience for me when I was sick drifted away. Especially a I used to like going out and partying, when I could no longer drink or stay up late because I was too sick, they didn't make the effort to see me and do different things. However, there were a few wonderful people who stuck around, and I made some new friends.
Now something new is happening - since I decided to be SUPER-strict with my diet (after a very long process of investigating and learning what was going on with my body, which involved other health problems too) and I am feeling much much better, stronger, clearer, calmer, and my life is much more "together", my friendships are shifting again. For years I was very tired, irritable, easily upset, co-dependant, and I was naturally drawn to similar people. In the past, if a friend was mean I would have stuck around as I needed them. Now that I'm much better I don't want to take anyone's s***! As I am less easily upset and less clingy, mean and aggressive people are just falling out of my life. It's kind of sad to see old friends go, but it's happening naturally and I'm not shaken up as I would have been before. I find myself getting closer to more together and calmer people, who in the past were on the periphery of my life.
The only thing I can say is keep on looking after yourself 100%, don't compromise on this just because the people around you don't understand, and I'm totally sure things will get better socially in time, even if it means building new friendships. And it's awesome that your man is such a gem.