HD...
You're getting it. I am starting to think of emotional fusion as a short circuit that goes haywire. You are inputting naughty puppy dog behavior and she automatically responds as mean, cold mommy. You have to break this connection and restart with firm, adult messages and not respond to her emotionally. I know you are doing all this, but you have to stand firm in the messages you are sending her because they will represent your most basic and fundamental wants/needs. You need to start with your most basic, immutable needs, those that can't be compromised, and believe in them, and forget about her response. It's what makes you YOU( and I know you're not really a hairdog)
J