Your BF seems to be very self-centred right now. Is he always like this? Don't ever lose sight of the fact that he really shouldn't have gotten in with you if he's a good JW boy. Whenever he dumps on you and makes you feel like crap, remind him of that. You've done nothing wrong. Don't let him try and make his situation your fault. I know you must love him, but try and detatch yourself from the situation for a while and think long and hard about what he's done, and HOW he's done it.
I don't want to criticize him as you obviously saw a lot of good in him in the first place, and you're in love. But this guy needs to grow a pair of balls. I think you just need to be the person to push him to GROW them. If you manage to get him to decide to stick by his doubts, and risk ostracism by his family and friends, then it will make you both closer.
You need to dig your heels in. Remind him that the Org is dictating his life, and what's he gonna do about it!
Good luck x