Ye its good, it sounds like he wants to quit.
If his mates all do it. He really needs new mates or only see them when they are not using.
It sends you suicidal and depressed, so hes better off it. I wish i never started it.
He needs look up.. emotional, mental and physical relapse
This will help him to cope with cravings and things that trigger wanting to get coke.
Id also keep checking on him, making sure your there for him.