((((DW))))
Most likely you are the only one you can change in this situation. Confrontation why bother? You have done that before and you are still back where you were.
Boundaries are for you not him. Take him out of the equation. When he does dope what are you going to do for you? How are you going to take care of you? Go somewhere, continue living, stop buying his goods and maybe he will stop trying to sell them to you. Get on with your life, stop revolving around your H and whether or not he is using dope.
(((((HUGS))))))