"Have you talked to your sponsor about this?"
Since he goes to meetings daily, yet has failed to establish any clean time let alone embrace true recovery, this might be a nice way to establish some healthy/functional boundaries and pronounce your detachment from HIS dynamics. Put the responsibility where it belongs and know one of the B-E-A-utiful concepts of NA/AA is it's one addict helping another.
Should his response be he doesn't have a sponsor, it's not your duty to suggest or mandate he get one... but I do think it should demonstrate something to you and can remove you from the responsibility/guilt of either "helping" or "supporting". Right now, your "helping" and/or "supporting" his continued use, not his recovery.
I heard a great line in a song today, "What consumes our thoughts controls our lives." So what's controlling your life today?
Glad you found us and keep coming back.
Many Blessings,
Shaman