Well it depends it can strengthen healthy friendships but also destroy them, a good one would be if you guys are just best bros smoking each other without any worries and just being happy and a bad one would be if your just using that people for weed and not valuable of their friendship so I can where the OP is coming from.
Well in my case, after high school I only have my stoner friends that were my bros before we started smoking. Every other friend I had that I met through weed are losers. So I would agree with the gentleman above that as long as they are not mooching off you and actually care about you as much as a friend can, it should be good. Everybody is different though. If you wanna test it out, ask your buddies if they want to hang, with weed. See what they say