i guess the question is how to combat the y"h who won't let go
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The way to "combat" the y"h at this point is to simply have nothing to do with him. Don't talk to him, don't listen to him, don't think about him,(even though he is thinking about you), don't engage him in dialogue, and don't look or consider anything that he has to offer.
deep down the fear is from risks and letting go and accepting a new way-a better way,
This is your chance now of putting everything on Hashem, to completely commit to him 100% as Guard has said. And, how can you do this in a kitzer derech? You leave the Y"H 100%, a complete divorce-no more looking back over your shoulder, and......then you listen to Hashem 100% and do everything that he says, (this is what you refer to as "risks", and "letting go", this is what we call at this time....cheiruseinu. The true freedom.
And I can promise you that you will not regret this at all.