I would not tell her to leave you alone, just find a way to make it happen without cowering in fear or running. If the kids aren't there she has no reason to be there.
When you start to detach you will hear this
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Of course, she showed up in my bedroom first thing in the morning, grabbed my hand, and said ILY.
and say "You sure have a strange way of showing it".
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At the moment, I just spend my time in another room. Of course, she comes into my room from time to time, stares at me, and starts talking to me. I suspect she feels guilty or nostalgic, neither of which mean anything.
Lock the door.
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I wonder why it doesn't bother the OM that she spends so much time at the house with me after she drops off the kids.
I would try to quit wondering about things like this. The truth is the you don't know if it bothers him or not. It might bother him, he might have 3 other women in the lineup, or a million other things can be true.
You seem really strong inside. Keep strengthening your emotions and mind. You are going to get through this just fine, I can tell.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.