I am TOTALLY confused!! Please help me, I'm begging for advice ='(?

I have a HUGE decision I must make asap! I need to decide between the father of my children whom I have been with for 18 yrs or my bf of a yr whom I am now carrying his child. Yes, I know I'm a cheater, skank, etc. but if you knew the whole story you'd understand. I'm afraid to leave the father of my children. I am extremely emotionally attached to him, he cleans house and watches kids. The downside? I've been waiting forever for him to get a job to help me financially with our 3 kids and the house and to get or fix our vehicle but I can't get him to. He promised since Dec that in Jan he would start working but we are now in July and nothing! He is also not very affectionate or living towards me. Keep in mind, all this thinking it is his baby I'm carrying. My bf on the other hand is very responsible. He has a nice vehicle which he calls it "ours" . He is extremely affectionate and constantly tells me how much he loves me and our baby I'm carrying. His downside? Since we are in a long distant relationship, I can't trust him. He stays up all nite online doing I don't know what. Another biggie is that he is 12 yrs younger than me and I don't know how long we would last. I'm 35, he's 23. I need to decide now what to do bc he already put in his 2 wks notice at work and is planning to come with me in 2 wks. I can't seem to leave the father of my children and this is going to be a catasrophe if I don't hurry and decide. Your thoughts?