good questions, ayana. justme, i'd suggest he go it alone for a year. for many ppl the addiction will call him back. at least one year sober and drug free would hopefully convince him that sobriety is the answer to a new way of living. you could offer to go to some open AA or NA meetings with him to support his efforts but i wouldn't suggest your keeping the relationship alive other than that. his past history with you illustrates this fact. thus far he is not willing to change. in active addiction we take hostages (you), they say. i'm sober 20 years i understand that saying. being sober enabled me to have meaningful, healthy relationships. being drunk, i was unable to do that.
al-anon is a good way for you to help yourself too. i wish you the best.
we're here for you and i'm glad you found us.