Zev,
So many have given you such good thoughts and offered such support. I am here to add mine, also. (Support that is, whether the thoughts are any good is, of course, your decision)
The thought about avoiding getting df'd by claiming depression is actually a very good one. My ex-husband did suffer from depression for years, slowly quit going to meetings, now he hasn't been to a meeting for years and has had several girl friends, and no one has ever come after him! And he has witness relatives, but they aren't about to rat on him, because he's "depressed", and not responsible for his actions. Hell, I'd rather be labeled depressed by my JW relatives than "apostate", know what I mean?
Anyway, as far as your wife goes, as everyone has said, only you can make this decision. But I have to wonder, without the physical closeness in a loving relationship, how much "love" is really left in this marriage? Just my opinion. If you think there's even a chance of rekindling the love, then fight like hell for it! But if it's gone, buddy, there ain't nothin' you can do to bring it back. You can have your pain now, all at once, or hang on maybe for years longer, and still have the pain of the intervening years, and then have more pain when it all still falls apart. Me, I'd rather have my pain now, get it over with, do my grieving, and get on with my life. But that's just me. And whichever way you decide to go, a good therapist can be an invaluable aid to you in re-discovering who YOU are, and of course all the free therapy you get on this board.
Sorry I spoke so long, but your situation, and all the others who have suffered or are suffering likewise, just infuriates me! Take care of yourself, and please let us know how it's going. You know you will find unconditional acceptance here!
think41self