I wish you strength in processing the issues you're dealing with, space.
Sex acts are respectful so long as both partners agree to and enjoy them. If you don't like something, then your partner is being disrespectful (to put it mildly) if he carries on regardless.
If you are not sure how you feel about something, it's ok to say that, or to indicate it without words, rather than to go along with it because you assume that the other person knows best, or should get their way, or any of those other pernicious thoughts that too many of us are socialised into having.
Similarly, any sex partner should ensure that they have enthusiastic consent for anything they initiate. It's natural for you to feel disturbed that he didn't check, or ignored any of your non-verbal signals.
Good luck on your journey. I'm sure that in time, you will feel more comfortable knowing what your boundaries are, and stating them to anyone you feel is over-stepping them.
For sex, I think that "enthusiastic consent" is the best rule of thumb: both signalling it to your partner for those acts you enjoy, and checking you have it from your partner for anything you initiate. And never hesitate to stop and change (or stop entirely) if anything feels not quite right to you. You're always entitled to.