so was i abused? am i allowed to still feel this way?

quite a long story here but some things I've been struggling with for a while.

So while I was in my first year of uni (3rd year now) one of my flatmates started touching me in inappropriate areas, it started in group situations when s group of us where watching a film etc and for a while I wrote it off as being accidental and then began coming to my room afterwards and apologising so he knew it was wrong I just wasn't going to make a scene in front of people including his gf one of my close friends. this escalated to him coming into my room to check I was ok (was going through some health/mental health stuff) and we basically did everything but sex. I was never fully comfortable but I didn't know what to say, I would bleed often and I would almost always cry afterwards as I felt so guilty. this is where it gets confusing tho, I didn't have it because I was getting attention that I had never had before and I would feel almost rejected if something didn't happen. fast forward the summer break he would send me pics often and ask for them in return and keep asking until I gave in. I moved into a house with him and other friends the next year, things carried on as before and I ended up losing my virginity to him on the sofa, he asked if I wanted to continue and I said yes because I felt I couldn't say no, when I'm sure I could have. we had sex a few times and he carried on pushing even when I was in a new relationship and made it clear many many times I didn't want anything more. how am I meant to feel about all of this, has anyone been in a similar situation. I feel like I don't know whether I am allowed to see this as abuse or because I said yes I can't. my partner knows all of this and has been incredibly supportive, never pushing to do things until I was ready because I would have flashbacks to what has happened before.

thanks for any help with this