Is it bad he told me this?!hes 16?

This doesn't show that at all lol. This basically just means he thinks its bad for girls to sleep around (but I bet he thinks differently about himself.) and 16 year olds shouldn't be trying to seduce 13 year olds as it is. So you shouldn't let guys touch you. And this kid wants to take advantage of your innocence, ha what a creep.