My ex totally mishandled our breakup. How should I be with her moving forward?

JT017
So long story, my ex and I had a mutual breakup. We were 16 years together, high school sweethearts. We have a 12-year-old child together. Less than 2 weeks after we broke up she tells me she's already dating someone from work. I haven't even moved out yet. Everything was going smoothly until this happened. It really hurt that she moved on so quickly and she really didn't seem to care. She said that the new guy wanted to wait until I moved out but she said that it was her idea to push through with it.

She still says that she wants to be friends since we grew up together and have so many memories. So 2 days ago, we have a discussion about that very issue. I told her that there's no way I can see us being friends in the future because how much she disregarded my feelings in this whole thing. She tells me the hurt I'm feeling is the same thing she went throughout our relationship.

I'm here thinking that we chose to end it on good terms but now she's rubbing every mistake I did in our 16 years in order to justify her acting like a heartless person during the post break up period. Somehow that's karma in her eyes. She has twice the amount of screw-ups and at a much higher degree than me but I didn't say anything because I want a good enough relationship that I want to keep seeing my daughter without fighting.

So my question is how do I move forward from this? She obviously does not see what she's putting me through as a problem so if I want to disassociate then I'm the bad guy. All I want to do is see my daughter.
My ex totally mishandled our breakup. How should I be with her moving forward?
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