You should get in touch with him, people need a lot of support to kick a drug addiction, especially one like crystal meth...
My older brother isnt much of a brother, and he has brought me to a lot of bad places and I have seen some crazy shit; meth is by far the worst addiction I have ever seen in people. It WILL ruin your life.
And since everyone is sharing, I smoked a lot of weed but thats it; no alcohol, never done coke.. I have seen the effects those things have on people and couldnt imagine allowing a drug run my life.