A junky's life is spent begging, borrowing, manipulating, conning and stealing money and stuff that can be sold or traded for dope. Then there are all the cell phone calls and text messages to make the connection.
Addiction is progressive.
Ignore his words. Pay close attention to his actions. And don't be surprised if he's not really attending those meetings.
If he really sought sobriety, he ( not you) would seek additional recovery resources.
You are 19 and have the choice to spiral down with him or let go, let God.
If love could cure them, none of us would be here.