Am I (20F) overreacting about my boyfriend's (19M) actions?

I've been dating my boyfriend for about a year and a half, and we started talking a year before we officially became a couple. Generally, he’s the sweetest guy, so what he did really surprised me. Back in July, I went out with my best friends to smoke some weed, and then I returned to his place because I didn't want to go home. I was really out of it and couldn’t think clearly; everything felt blurry. During that time, he took advantage of me and had sex with me despite my uncertainty when he asked. After that incident, I broke up with him for about a month, but we got back together when he promised it wouldn't happen again. Now, about six months have passed, and every time I see him or think about our relationship, bad memories resurface. I find myself questioning things and struggling to move on. I’ve talked to him about how I feel, and he apologized, expressing regret and assuring me it wouldn’t happen again. Despite this, I can't help but spiral into negative thoughts. I'm torn about whether breaking up is the right choice. I genuinely believe he loves me, and this was out of character for him. Still, I've started to feel resentment, which he isn't aware of, and I haven't confided in anyone except my best friend. She suggested I end the relationship, but I'd like a different perspective since she's never liked him much. What should I do?