I need help and suggestions about what to do about my marriage?

I have been married for 11 years and together we have four children from 7 to 16 yrs. old. I developed Fibromyalgia some three years ago and discovered that even before then my husband has been going onto singles web sites. I have actually seen a couple of his "profiles" (yes I was snooping. ) On one he stated that he was divorced with three kids and really liked the stuff. (sry eewwww) Then I ind out that he's been ordering on the cable. I got the mail before he did for once. So he's been trolling for s and watching them online and cable. Now, mind you I may hurt like hell all the time but I still have a drive! He hasn't even tried to touch me in 6 months! I figured it was stress. (Isn't everyone stressed out these days?) I don't know what to do. I can't find a job with my limitations and have no income coming in. I have no car and I get $91 a month in food stamps and Mhealth. He keeps saying that he's going to find another job that pays more so we can get out of the hell hole that we live ing right now. He is 50 and I'm 37.