One of my plates B (all of which I have been straight forward with about us being open and me staying on my path) and I had "the talk".

Unfortunately the night before the "talk" I was out with a different plate A and ran into a friend from out of town. We stayed up all night celebrating and indulging in recreational activities. The next day plate B wants to meet up. I agree even though I am running on no sleep and a micro dose of psychs. (terrible idea I know).
We meet up have a good time. Go to my bedroom and in the heat of the moment she asks if I'm enjoying myself (I've put up with a lot of her baggage because the sex is insane). I said yes and she drops a "good, get all you want cuz it's the last time". Triggered tf outta me so I stop and she starts crying. Tells me she needs more than I have been giving her emotionally. I told her the night before that "I give my attention to things that have earned it" and that triggered her apparently because she "gave her body to me and lets me do the things to her that I do in the bedroom (it's very bdsm) and that should be enough of her earning it". She always feels like she has to earn her partners affection and it's not fair someone should want to earn her affection too.
I told her I have a trajectory and I'm doing what I need to do and that's that. She said she didn't need much just a text every now and then. I'm ok with that. Then she brings up the Open relationship thing. That she wanted to be ok with it but she's not. She's had her fill of the dick carousel and she wants me, and deserves someone that knows that they want her too. Told her: I do want her I wouldn't spend time and energy with her if I didn't. Then she tells me I'm one of her special people, (on the level with her family) and she's super attached to me, says she has to let me go and cut me off completely if the open relationship is what I want. (She's told me about threesomes she's had in the past and hyper abusive boyfriends so the fact she's pulling this with me means she thinks she can get away with it)

Now I'm on no sleep, a hang over, micro dose of psychadelics, and high dopamine and t from being mid sex, so I told her the open thing wasn't an end all be all for me. FML
Next day I realize what I've done. Decide I need to bring it up again and tell her if she feels she needs to go then she can and my door is always open to her.
Next time we see each other, she is telling me how powerful she felt telling me her boundaries with the open relationship and normally she wouldn't do that because she is always afraid of losing the other person.
Later her friend comes over. Her friend leaves and plate B and I walk her friend out. In my building on the way back I hear someone open a door and I pull away from holding her hand. She gets upset and tells me I need to figure out what I want and until then I'm "not allowed to use her body" or some shit. When she left I hugged her goodbye and she said she "wanted a real one because we wouldn't see each other for awhile", I went to walk her out of my building and she gets serious and says "I'd prefer it if you didn't" gave me attitude when I told her to text me when she was home safe.

I honestly am very connected to this woman and wouldn't mind committing to her, except for all her baggage and the fact that every time she wants something she uses sex as a tool, she gives herself to me as a weapon to gain control (look I did X so now you have to do Y). Like she gives herself to me fully in the bedroom so I need to give myself to her emotionally. Sex is for both of us and the fact she uses it that way is another huge red flag.

So I'm pretty sure it's over with us, but there hasn't been an official trigger pull, I feel I need to end it with all this drama and chaos that is no longer healthy growth. I like to leave my plates better than I found them so I'd like to end it on a high note without me saying "I accidentally was a bitch and let you think you had control, and now I'm throwing a tantrum and ending it". That's how it's going to be perceived if I end it now.

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Any thoughts ATRP on how to proceed?