I am one of Those dumb girls.. I swear.?

I've been dating a guy for 18 months, the first half of a year was great. His roommate threatened to move out so I told him I would move in. I moved in and I belive a couple months later he started to get pictures from a girl online (They were VERY suggestive) they also started texting when I went out to Nevada for a few days to pick up my daughter.(I found out about this about 10 months after the fact). January to March of this year he went to school full time and trucking full time and I cooked and cleaned for him. He got his licence and started to apply to jobs. He also started to avoid me when we were to go to bed. He would stay downstairs and I found out he was talking to other women online and watching (also found this out after the fact.) so In June of this year he got a job with a trucking company he took the job and a month and a half into the job he got in an accident and became totally reliant on me. I have been taking care of him for two months. When he was gone trucking is when I found out about all of the other women and , I have to say the doesn't bother me I would just rather have him talk with me about it. The more I think about things the more I think he is a really shady guy seeming to just waiting for something better to come along. He tells me know that I saved him and how much he loves me. I want to belive him but with the history its really hard to swallow. Day by day the more I think about it the less I want to do with him but I know he needs help right now and that I love him. What do you think about the situation?