BL, I see you're not responding. I hope we didn't scare you off, but if there's someone else involved here, it may actually be GOOD news, because:
1. it would almost entirely explain why your wife is behaving the way she is; and
2. it gives you a higher likelihood that she'll be open to working on your marriage once the influence of any 3rd party is REMOVED from the picture.
Looked at another way, if there ISN'T someone else, then she really just has some serious issues with YOU, which may be harder to fix.
In any event, we could also be wrong, but I rarely am. It's best to be careful, and to emotionally prepare yourself for the possibility of an affair, so that you're not punched in the gut to the point of total devastation if/when you find out.
Please continue to post here, so we can know what's going on.