Rationalizer – I really ought to listen to your advice. But it hurts to even read your rationalising, let alone to consider acting upon it.
Let me share something which seems irrelevant from the film "Band of Brothers" which helped me to get over my fear of hell. It's a film about US soldiers during world war 2. There's this one guy who just seems completely fearless during military operations. He is asked how come he is so fearless, his (paraphrased) reply was.
"You have fear because you don't want to die. We are ALL going to die in this war. The trick is to accept that you are already dead, it just hasn't happened yet"
It's the same for your situation. The damage has already happened, the misery has already been introduced into your life, it's too late. So now it's time to stop being scared of the consequences, accept them, and go out in a blaze of glory looking like a fucking ace WWII hero!
(Film spoiler, read it backwards........eid ton seod retcarahc ehT)
The best advice I can give if you wish to stay with her but NOT do this shit is as follows. Make sure that she knows 2 things
1: You are strong enough to leave her and find someone else
2: But you love her very much and would prefer not to have to
That way you can show her you are strong without having to leave her. You have accepted her, it is time for her to accept you. If she has to change you to make you into what she wants then you are not what she wants.