I agree with Lost generation when he says to start cutting back meeting attendance immediately. You don't have to drop it all cold turkey, but you need to start cutting it back. You should also cut back the field service as much as you can and that is probably the best thing to drop first. Listen to your heart as much as you can; it'll tell you when things are starting to get too much and when it's time to start pulling back even more. I also think it's a good idea to feign depression when ppl start asking questions, if you don't already have it for real. It sure worked for me.
Sooner or later, you'll start figuring out that your "friends" in the congo aren't true friends at all. Eventually their presence will start to grate on you and you'll be glad to spend less and less time with them. If you resist the impulse to pull back, you'll start paying for it with your mental health.
Family, of course, is much harder to deal with. Not everybody's circumstances allow for, but if possible, it would be a good idea to at least consider moving farther away. That way, you can keep your private life out of sight and it'll be easier to cover up your lack of "spiritual" activities. I'd also have to say that there's no point in talking to anyone about the WTS BS until they are ready to hear it. There is that old saying about leading a horse to water, if you recall...
V665