snorting suboxone? that's pretty crazy. snorting anything will hurt him, not just physically, but bc it's a behavior associated with his addiction. psychologically he is setting himself up to fail. if he continues doing it, how easy will it be to start railing percs or oxys? how soon before he decides to do "just one line" of coke? if he is serious about recovery he needs to stop abusing the suboxone.
Is your boyfriend prescribed these subs? I would just have him take a look at this forum, it's proof enough. We are all addicts either in active addiction trying desperately to get clean, or some type of recovery. Addiction leads to either jail, institution, or death. Proof enough.