Guy I Like Involved With Drugs

Right now I am a high school student. I'm only out to a close friend and my therapist. So a few months ago I started talking to this guy in my gym class. He makes it pretty clear that he's gay. As time went by, especially this past week, we started to get pretty close. I think I've made it pretty clear I'm into him and I'm 95% sure he likes me back. He even asked for my number. Yesterday I found out that he does drugs and smokes. I really like him but I don't really want to be involved with that kind of stuff.I've come up with a plan. Since spring is here, I'll see if he wants to go to the park or something one day. I chose the park because it's a public place but privacy is still available which should create a more comfortable atmosphere. I'll tell him how I feel and make sure he feels the same way. Then I'll ask about the drugs. I'll start with how he started and why he continues to do it and then I'll ask if would ever consider stopping. Is this a good idea? Is it worth it?I should mention that my main concern is not me getting involved with it but him turning to worse drugs. I don't want to have to deal with a mess later on in my life and I want what's best for him.