so i said, "i don't want to have sex."
You made it clear right from the start. Rape or sexual assault, It was not consented and he crossed your boundaries. I would seek help, I would report this, because like I said in my previous reply:
No means no! When you do not consent to sex and he still has sex with you, it is rape!
I hope you get the help you need. No-one should have to experience what you went through. And it isn't wrong that you didn't try to flee. Please don't doubt yourself, you are the one that has experienced this, and have came on this site asking for advice. That sends the message that what you went through wasn't right. Who asks for advice about sex they consented to? Would you have came on this site if it was just a bad sexual experience and asking advice?? Were you confused about whether or not you wanted to have sex, yet. . .you said no many times?!!
There is a difference in your story. You made it clear to the guy that you didn't want to have sex and you continued to say no. He continued to have sex with you and just because he wasn't forceful, that still didn't give him the right to continue to have sex with you and ignore the fact that you actually said
NO! No means no. It doesn't mean - okay, I want to, but I am confused or not sure, so let's do it anyway and I will continue to say no when I mean yes!
It doesn't matter you didn't flee, or fight him off or he was manipulative, or he wasn't forceful enough or that you are seen as giving in. No means no and as soon as he heard you saying no, that is the exact moment he should have stopped!!! No is a clear cut answer and response!
Consented sex can have it's bad experience, but it is still consented. You knew you didn't want to have sex. You said no right from the beginning and during it and it was ignored. Please seek help and report it. He was wrong. Do not doubt yourself.