I'm 16, and have a boyfriend of the same age, we've been dating for about a month now without doing anything sexual. A few days ago we were hanging out with his friends at the beach, and his friends pantsed him (pulled down his trunks) and I saw his dick. I was really disappointed at the size of it, and if I had to guess I would say it was about an inch. I don't know how big they are supposed to be at our age, but I didn't want anything to do with him after I saw how small it was. How should I bring this up to him so that I can break up with him?