Am I putting myself in danger?

So I downloaded tinder last week as a joke but then decided to create an account for real. I made a bunch of matches on the first day and one of them was this guy I had seen in school before but that has already graduated. At first he invited me to go on a bike ride because my bio says I’m down to bike anywhere. I said sure, but I was about to spend a week out of town so it had to be after that. I got back yesterday and he asked me if I was down to go to the beach today. I said yeah. Today he hit me up and asks if I’m down to bike to a dispensary, get some weed and go back to his place chill. And I already have an alarm blaring in my head because this all sounds sus.

I recently turned 18, he’s 19. I just want to know what you guys think of this. If you see this as dangerous too.

I didn’t necessarily want to hook up like that on the first day. And on his bio it just said he moved into a new apartment and he’s also looking for new friends.

I’m aware I might sound naive but I’m not, I just sometimes have a hard time knowing when I should trust someone.