As the former fiance of a serious substance abuser, I completely understood why Jon wanted a divorce. Anorexia, Bulimia and sever substance abuse make people extremely manipulative and controlling. April wouldn't even let the man say two words without cutting him off and calling him a liar! I believe Jon had done EVERYTHING he knew to do to help April including marry her. I didn't miss when he said that she told him she would go into treatment once they got married. That couldn't be more manipulative and controlling.
When you love someone intent on killing themselves, the threat becomes a weapon wielded against you. It is blackmail to get you to do whatever they want. Nobody, including (with respect) Dr. PHIL can even begin to understand the level of sheer hell this poor man has been subjected to during their relationship. All he got from Dr. Phil was the old better-or worse-sickness-and-in-health guilt trip that I got when I left my drug addict fiance. Jon deserved as much compassion and caring as April got. Of course, she was sick and needs to recover for herself. She needs to think about herself and make this whole thing about her. The problem for Jon is that its ALWAYS been about her.
They never had a marriage in the first place. Unlike cancer, its not that the treatment can hurt almost as bad as the disease. Getting the anorexic or drug addict to get help is more than half the battle. They don't want help. It consumes the people who love them. It destroys the people who love them. When April finally went into treatment Jon finally had the chance to exhale (maybe even for the first time since getting involved with her). Why is anyone even surprised that he bolted?!
If you read this Jon, Dr. Phil may not get it, but some of us do. There was no easy way to end things with her. Every time you had contact with her, you ran the risk of getting caught up again in, "just wait until I ... then you can leave". You ran for your life. Marriage isn't supposed to mean letting your spirit die on the alter of someone else's problem. You got out. That was an amazingly brave thing to do. Staying would have been the more socially correct thing to do, but nobody had to live that hell but you. Don't beat yourself up over this. You did the best you could. You did all you could. Now, do all you can to recover from it.