Relationship Question?

I met a man online last August, things have happened, need some advice. I was doing some work online, cam work, (not ual) he came into my room and we got to talking. As the days, weeks went on, I learned more about him as he did me. He knows I'm married 24 years. I have a tendency to help people who aren't happy in their lives. This man, I'll call him 'Karl', is a 52 yr old virgin, actually told me he wished his mom wasn't alive when we first met, and does feel bad he ever said it. One day stood up to her and said, my son is becoming a man!!! I was floored. It took him MONTHS to tell her he had a female friend...me! He has always lived at home, basically, a mama's boy like I've never seen. He even seems a bit on the feminine side, never stands up for himself. He lives with her. His sisters are like 1/2 a mile away and rarely go there to visit, she goes EVERYWHERE with him. Well, we became friends and would talk cam to cam. I told him we should stop because I didn't want him to get feelings for me, and he said he wouldn't, all was kewl, well, he fell in love with me. We talk everyday, 2, 3 times a day on the phone. I stopped the cam months ago. He is very lonely and depressed, mom basically supports him and rules the roost and him. He is coming to visit me in Sept., strictly platonic, husband knows all about him. My husband agrees he needs to get away. NOW, since last August I have tried to get him to get a part time job, sign on with match.com, start a facebook to meet women, he says he's shy yet he's flying almost all the way up the eastcoast to meet me, I said, 'why me'? He says because you are easy to talk to and so nice. He rarely leaves the house without 'mama'. Its always mama this mama that when we talk. I've tried everything in my power to have him break away from her a bit, thir relationship is VERY unhealthy. I am TOTALLY stressed, like beating my head against a wall. I can't take this anymore. He has NO ONE! He's been a great friend, he lent me a lot of money to help me out, which I will pay him back, but I can't handle being a part of his and mama's life every single day!!!!!!! Any suggestions please? I don't want to hurt him.