There isn't anything you can do to get him into recovery or stick with a recovery plan. Don't feel guilty. Maybe step back and just be a supportive friend until he can demonstrate a commitment to staying sober.
Ask yourself what it is you want from the relationship and if he cannot provide it for you, there is your answer. Waiting around to see if he would be able to is unfair for you since there are never any guarantees with alcoholics.
Good luck
