I might get a boot for this but....

Learn to lean into your own autonomy.

If you said no, but was still doing it(or ....it does give the impression that you were being bratty more than being serious.

Many girls say no but want it, in a playful sexual way.

Now...if ya never discussed that, he still violated a consent.

But part of this sounds like a communication mishap. Especially the part where you said he wasn't physically violent.

Is it that you feeling he violated you or do you feel nasty because for natal born women...giving oral sex and ejaculate in the mouth is seen as degrading?

One its not.

2) Sit him down and have a clear, concise list of what's okay to you, and whats not okay.

And stand on it.

He was definitely selfish in this But that's not automatically making me see him as a predator

Especially with all this porn men ingest and I personally see women saying no but meaning yes. He not lying when he said that.

Ultimately it's up to you. Still get treatment, therapy. Trauma is definitely trauma. But if you can't get over it...maybe it is best to leave him and focus on yaself.