It's not the end in the least! It's just a station along the way. We don't even know where the road is leading.
Look, lately you've been worrying about every single interaction with her, every word. If she leave, you will have less of that. That will give you more time to really focus on you. Not because she'll see it, but because it's what you need. That's why I say it isn't all bad.
Her not living there could well be a step that has to be taken for things to get better. Whatever you do, don't beg, etc., to try to stop her. If she says she is going, accept it as gracefully as you can!
