This illness can def. take a toll on relationships. It's hard to deal with for most people and it takes a very special person to stay with someone through all the good and the bad. I am so sorry you have to deal with this on top of everything else. I went through a breakup of a 6 year relationship when I first got diagnosed and was basically house bound for almost 3 years. I was 26 and I thought I would be alone forever because of lyme disease. It turns out, that relationship was not meant to be and I went on to get well and 2 years later I met my future husband and we have been together now for 7 years and have a beautiful 23 month old daughter.
So, just when you think it can't get any worse, there is light at the end of the tunnel and you never know what is waiting out there for you, sick or not. You will find it.
Stay strong and stay focused on your health.