sexual assault? TRIGGER WARNING

When I was 14- 16, I was in a heavily abusive, controlling and possessive relationship, and eventually he started to pressure me for sex... He messed with my mind so much and I felt scared that if I didn't have sex with him, he would leave me and he had me believing that if he left, my life would be over. Not to mention that if he left I knew he would spread awful rumors about me all over the school, as he had done in the past when out relationship was "good". He kept pressuring me and I gave into sex about 5 times. Then he dumped me. I was depressed for years and to this day I still feel the emotional scars of that relationship. I recently went to a take back the night rally at my college and the defined sexual assault. I never thought about it because I didn't want to. Was I sexually assaulted?