Most Helpful Guy
Some do, and vice versa. Are you "talking" to this guy or are you actually dating? If you aren't dating, then it's kind of silly to agree not to talk to other people. You are young and need to talk to a lot of guys before you settle on one.
Most Helpful Girl
Are you exclusive to each other then? If you both agreed to exclusivity and not dating anyone else than he is basically cheating and untrustworthy. I wouldn't hang around with him anymore if he did that to me. If a person is not good for his word than he is not good for me, or you.