Whats the point in not doing it?

Alright so, my friend is letting me come over to his house tonight (I’m sneaking outt) and he smokes weed and… Stuff a lot. Well he’s assuming I’m going to smoke with him. Which is fine, I’ve done it a few times so one more won’t hurt. Anyway, the guy I’m in love with hates it whenever I do stuff like that (which isn’t often but still) and he says that if I do it again, things wont look so good for us (we’re not even together, but I still care about how he feels about me of course). But last night, he totally broke my heart. He said that he wasn’t even sure if he loved me because he didn’t exactly know what love meant. :’( so at first, I wasn’t gonna smoke with my friend because of my love for this guy. But now, whats the point in not doing it if he doesn’t even know if he loves me???

I am so confused and don’t know what to do. Please help!!!