He Cheated.......I want to leave but afraid

My husband cheated. Cheated in the worst way. Both an emotional affair and physical affairs inbetween. Not sure whats worse. Married 6 years, have 6 kids. Youngest is 2. He lied our entire marriage as I've now discovered. I dont trust a word he says now. Its only been 3 mths since I found out. There are his children from previous marriage that will be affected AGAIN buy this break up. Sometimes it seems he's on egg shells, sometimes it seems he doesnt care. The respect is gone. How do you respect someone that would hurt his own kids AGAIN for the 4th time since he left their mother? This is my second marriage. Im afraid of going through the single parenting thing again. Im afraid of what this will do to my youngest in his future. Im afraid of raising the only boy in the family with out a full time father. Ironically we have and STILL get along even after I found this out. Not sure if its because I really just dont care anymore or if its my way of not facing my feelings. The two people in my family that I told both want me to leave. Once doesnt have children though so its hard to get her to understand why I feel stuck. As a woman, I am fine with leaving meaning I have lost so much respect for him that I know I dont love him as a husband. I do care about his well being but not the way you care about your husband. So if I dont care should i stay and make sure the boy has his father full time? Or because I dont care should I go? Even though he chetaed I also feel sorry for him at times? Sorry because as much as he thought he was getting away with all of this he doesnt have the guts to leave his children. Now that he was caught having a full blown very intense emotional affair ........he doesnt want to leave? Why is he putting this on me to decide? This was his plan all along. So why now does he want to stay. What are the chances he's still talking , seeing, emailing, this other woman? Should I even ask? Does it matter? :confused:

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