K.; well, cheating is cheating no matter wether married or not, being married obviously wont stop cheating, married to each other is a commitment both of you make as a promise to stay together, thats the problem with todays society everyone gets to have their cake and eat it too, you cant marry someone who dont want to marry you , thats not fair, and if he dont want to be like his dad, then he should take the steps to change it, follow the bibles advice and treat your woman with dignity and respect, and have a greater love for god, and that helps in not committing fornication outside a relationship, the children you have need to have a stable environment, give them that, however you can, but being a spiritual person can help, im not gonna say make him marry you its the right thing, cause the right thing is to not sleep together at all till married, so doing the right thing has to be what is best for you and your kids and each other, i would say your questions are legitamint, i would ask him in private about his cheating ? and how does that stop him from marrying you ? and that you can work together to help him not feel he needs to cheat, his desire to just not be like his dad is commendable, he should be told that, ad thats probably what drew you to him in the first place, his good qualities, bring those out and you can promise to help each other to make each one stronger so you have a good strong relationship, there are some very nice bible programs out there, that ive seen help families be a source for good, i am a bible teacher, ask me about it you need more information on how it can help, be happy, D. s