How can I help my relationship?

I really don't know what to do with this I am hoping some of you can offer some insight. I have been married to my husband for 4 years next month and we have 2 children (3 and 1 1/2) together. Our relationship started very fast in the beginning, we started dating and got married in 10 days, and then got pregnant after the first month of marriage. We were really really happy and the perfect couple, but now for some reason he doesn't want to be with me anymore. Over the past two years he has just started to slowly love me less and today was just the end i guess, (but I hope not). I don't know what to do to help our relationship. Right now we are both under alot of stress. We started a business about 7 months ago to help ourselves have a little more money, which is supporting us mostly but is still on the small side. The house we are in is soon to be in foreclosure. I was recently diagnosed with Multiple Sclerosis and complete peripheral vision loss. We are with each other constantly and have been apart for a maximum of 10 hours since we got married, which may be part of the problem (maybe i am not really sure) but we work together everyday. I know he is not cheating on me so that isn't an issue. I really don't know what to do. I cannot survive without him. I can't drive because of my conditions therefore cannot work, go to the store, go to the doctor, anything. I love him 110%. I just don't know what to say to him. He says I am annoying, but will not elaborate or give any examples. I have tried to tell him how this will affect our kids, but he won't listen to anything. I just don't understand how he can go from being totally in love with me to borderline hating me. I really do not know what I did. Please Help. Thanks