What should I do if the guy I like does drugs?

[VWVS]

This guy is a really great guy. We work together a lot with our local youth services and do community service. He's really funny and nice and I like being around him. I'm not completely sure if I want to persue a dating relationship with him, but I would like to get closer. Some people he is friends with I am also getting to know and I am almost positive that most ofthem do drugs/alcohol too. I know for a fact that he has based on his Facebook page, and honestly the majority of the kids in my town have at least tried them. Just recently though he scoffed at this place in the woods where kids come to chew tobbacco. I'm not sure what to do about this. I would never be pressured into doing drugs or alcohol, but if I want to become better friends with and possibly date him, and become closer with the others, and they all drink/ do drugs, I don't know how fun it would be to hang out because they might all be doing that stuff. Any advice?