I was hanging out with this guy I know. I know him well, we were really close friends. He's always had a girlfriend, so that's all we've ever been, friends. Recently they broke up and he came over to hang out. I told myself nothing would happen. As the night progressed he was getting closer and closer, and definitely flirting more. We hadn't been drinking, we were completely sober. Eventually he started kissing me and a bit of foreplay began. The human response in me had me playing along, so I didn't stop. He then took off my pants and he took off his too. I asked if he had a condom and he said no. I immediately showed discomfort in the idea of unprotected sex. I said, "thats a big problem," and "I don't think this is a good idea." He reassured me that it would be fine, and I didn't want to continue, but it just started. The intercourse lasted all of 5 minutes before I finally had the guts to say I wanted to stop. I know in my head I didn't want to, but I feel like I didn't express is well enough to him. My words indicated I didn't want to, but my actions derived but my natural arousal said otherwise. Either way now I'm worried because we had unprotected sex, even for just a short amount of time. I don't know what to think because I feel like its my fault I didn't say enough, or back up my words. I'm lost, panicking, and beginning to blame myself.