Living with and possibly leaving a sick spouse - a heartfelt story from a reader looking for advice

Well here's a opposite to all that. I have a chronic incurable disease which belongs in the MDA family. There is no know cure or medication to help it. I don't let it stop me though. I'm active, work, great attitude and fun to be around. Nobody ever hears me complain about my situation. It's called acceptance and I live life fully with limitation.
Now my point. My significant other of 13 years, who promised to care for me forever just ended our relationship. When we were together we laughed, enjoyed each other, great sex and did things that were within my limitations. We always talked about when the day comes she will need to take breaks and let one of my kids fill in so she can take care of herself. She jumped the gun and said she needs to take of herself NOW! She was too busy taking care of me. Now the extent of my care today , July 1, 2016 is: let put my hand on your shoulder as we walk for stability, put on my clean bed sheets, and make sure I get into the car without falling. That's it! I cook, grocery shop and run around for and with her. So I guess maybe she did me a favor now rather than when I'm really disabled. But I'm really disappointed.

I am 67 years old. I have a husband who has cronic back pain for the last 30 years Because of that, he is a drug addict and has been to a few drug rehab facilities. I don't doubt he has pain. But I've been dealing with this issue for so long already. Of course, he's retired. but I am still working part time 2 days a week, 3 hours a day. Nothing to live on, but just enough to add just a little extra. At this stage of my life I am not able to get a full time job. I don't have ANY relatives left. I'm an only child (so is my husband). I do have 2 grown children one live several states away and has his own life and career, The other once, although just a few cities away, has her own daughter and life. If I were to leave, there's no place for me to go to, no job to substain me, and I loose all my medical insurance.
In a week, I'm going up to visit my son and my daughter and her family are coming with me. Everything has been fine up until now. Because I didn't buy him a gallon of ice cream when I went shopping, and instead I through I would surprise him with a flavor he raved about. Well, he just went blastic. Yelling, screaming, threatening about how he wanted a GALLON of CHOCOLATE ice cream. We haven't been talking since yesterday, and now he acting like he's on death's doorway. He did something of the same last year exactly a week before I went up to visit my son. That time he was able to be admitted to the hospital and I was able to get him into a short term rehab/nursing facility for the 2 weeks I would not be home. This year, I doubt he'll be admitted into the hospital. He can't be left alone for 2 weeks, (he can't drive and I'll have the car)
Do I miss my time/vacation? What can I do about him. Where can I take/put him for 2 weeks --- That's my main question.

I feel like we are married to the same person! I resolved to leave my marriage four years ago, after our oldest child graduated H.S. I had been married for 21 years to someone who once was goofy, fun-loving, and kind. We had a great sex life. That all changed about 15 years into our marriage. I married him when I was 19 and he 26. I think we just grew apart instead of closer together. We had not been intimate in over five years. Before I had my chance to escape, my husband suffered a cerebral hemorrhage and spent 17 days in the Neuro ICU. During that time he had numerous brain scans where they discovered he also had MS. Since that traumatic brain injury, he has not recovered mobility, has stopped working and filed for disability. He turned into a mean-spirited person. The only things that come out of his mouth are lies. He put on over 100 lbs. He resents our children (for their youth? for their agility? for my love?) and is nearly abusive to my elderly disabled mother (dementia, COPD, PAH) who lives in our home.
I've begun cutting myself to ease my own pain, disappointment, and despair of being trapped in an unloving, one-sided marriage. I'm only 45 years old now, we just had our 25th wedding anniversary, and I hate waking up most mornings. I feel trapped. He acts like an angel around others, including people in our Church, and never says a negative word about me. If I were to leave him, I would be labeled a bi@#h and would lose what few friends I have. The only ones that would support me would be my two older children, who see their father for what he has become.

So much for in sickness or in health...