I don't have a lot of time, but you really need to let all this go. She can divorce you and she can ultimately have those kids around a million different guys if she wants. Quit imagining her relationship is so rosy. Eventually even the best of situations start to show strains and cracks.
And I'm going to hit you with a a 2x4 about how you handled the whole situation with bipolar vs. manic depressive. Why on earth would you even argue about that? As someone just wrote to me earlier... is that the hill you want to die on? If you want your wife to want you again, you need to listen to her and not argue. Agree, or repeat what she says so she feels listened to. Do you think OM is arguing with her like this?
Sorry if I sound a little harsh...
There is no arriving, ever. It is all a continual becoming.