Hi there, JWood.
I'm sorry that you're having to ask these questions. I'm also sorry that I'm afraid I'm not going to be very helpful. I used to think I knew what I was doing, but at this moment I don't feel qualified to give advice. I've been with my husband for almost four and a half years. He's never disappeared on me, but I he threatened to leave me tonight and I certainly have my share of other stories. (Like the time he picked a fight due and took off in the car, and I figured he'd probably be back but would be driving recklessly and I would be worried sick, so I started to change out of my pajamas and into my jeans to go with him just so he'd have a reason to drive more carefully, and he left me standing in the driveway with my pants half off as I tried to run to the car. How's that for codependent? Or for a run-on sentence?) I think you basically just have to decide what you're willing to accept and what you're not. I think I've accepted more than I'd advise most people to, but there are some things that would be past my limit. It just depends on where yours is.
I got my husband the Cognitive Behavioral Workbook, which he swore he would read if I bought it. He read about a quarter of it. He showed some improvements, but stopped reading it, and seems to be regressing presently. I don't know if your boyfriend would consider working in a book like that or not, or would follow through with it if he started. It might be worth a try, I suppose.
As I said, I'm not terribly helpful right now. But I decided to reply because I saw nobody had yet replied to your post. I'm in the same boat -- first time poster and nobody has replied to mine yet, either,

. Feeling pretty low and vulnerable and didn't want you to think that nobody was listening while you're waiting for someone more helpful to answer.
I'm sorry again that you're having to even think about these horrible issues. I really wish you all the best.