One who is addicted first of all will never hear anyone's words. It is the situation that has made a change in you. If you aren't into such situations surely you could've experienced the addiction for a long. Until and unless a person himself decides, it is impossible to get out of addiction. Getting close to religion should not happen forcefully.
Precisely, but at least, if we really care with him, we need to talk with him personally. If we can show our express that we really want to help him, in the end, he will accept us what our means. Sometimes we need to touch him deeply in his heart, so he knows that finally, someone wants to help him. That will need time before he realizes, but that is worth to try because we need to find the right time so we can get close to him and talk privately.