When I read this title I immediately empathized. I am going through exposure therapy right now and recently had to recount my own sexual assault at sixteen. I had never had sex before and this guy really hurt me when he tried to enter me. After saying no several times he eventually did stop, but I was incredibly damaged by this experience. It affected my sex life and my relationship with men forever after. Not only that, but the physical pain has created a lot of ptsd trigger issues when I later had to have a bunch of painful medical procedures.
Here's the thing. I have ALWAYS believed I didn't deserve to place myself among the other women who have been sexually assaulted, like I didn't deserve to be compared with them... I had no right to be so damaged by what happened to me. And I had to admit this to my therapist during my exposure session. I felt like an absolute fool. The truth is, I was there in his car half undressed making out with him because I was drunk and lonely and hurting already. And I was young and inexperienced, so I was too stupid to realize he would see sex as a natural extension of what we were already doing. And the truth is, it's not like he finished what he was doing... he did eventually stop. The most traumatic part of it lasted maybe a few minutes at most.
What my therapist helped me realize is... it doesn't matter if I was already in his car... it doesn't matter if I had already consented to making out with him... it doesn't matter that it didn't last a long time. I said no, my wishes were violated, and I was very hurt by what happened. Just the very fact that I was traumatized is evidence that what was done to me was not ok. And I know for sure that I'm not making up how messed up it made me. And there were other factors that I never thought about. Factors that gave this guy more responsibility for what happened than I was able to process at the time. Like that fact that he knew I was young and drunk and didn't think to make sure I was ok with what was happening or get any kind of consent before moving forward. (also the fact that he didn't immediately stop when I struggled and tried to get away from him and said "no, stop" a bunch of times, but that's obvious)
I don't mean to take attention away from your own experience by sharing my story on your thread. I was just thinking that maybe you would see some parallels in your situation, and know that you're not alone. For instance, there are all kinds of ways in which this man could - and SHOULD - have behaved very differently. He IS responsible for violating you sexually regardless of whether there was actual penetration or of whether you entered his dorm room, etc. The very fact that you are traumatized by this event proves that you were assaulted. Normal sexual encounters that are not assault should not traumatize you. Period. If my experience counts as assault then so does yours. I'd say yours is definitely worse than my own. Not that we should compare. Assault is assault, and it is normal to be traumatized by experiencing such a violation.