marriage problems

I have been with my husband for seven years now. He has raised my daughter with me and we have had one of our own and he's an awesome fantastic dad but he is a horrible husband. Idk what to do sometimes literally I feel stuck with no where to go. I haven't had a job for six years I've been a stay at home mom. Recently I keep finding signs he is cheating. His prediction text says things that were not sent to me or anyone else on his text messages, he screen shorted a photo to me that showed the POF meet me icon, and a month or two ago I found he was trying to talk to over 80 girls on POF. I love him but this is more than I can handle right now. I feel like I'm with him because he's a good dad and that would be hard to do to my girls and because I have no family where I am at no friends who could have the room for a mom and two kids.