<human>: Can you condense the text into three sentences or less?

We've been pretty close friends for a good 6 years. He and I both occasionally smoke weed or would have some drinks etc., but as of late, he's been doing a LOT of "exploring" as he calls it with many other drugs- drugs that are much more harmful than just weed or alcohol. 

He had been dating this girl for a few months and I think she has a lot to do with it. While he was dating her, we would essentially never hang out with any of his friends anymore, which is sort of understandable, but the problem was that all they would ever seem to be doing was getting drunk and high off of various drugs. Before dating her he had smoked weed and drank alcohol, and since they've broken up, he's done on multiple occasions- ecstasy, speed, vicodin, oxycontin, bars, lsd, dmt, and a few others that even I don't recognize.

They're now broken up and this is where the problem seemed to escalate. Whenever I or any of our mutual friends invite him to do things he always turns the offer down and will make some excuse about why he doesn't want to. Then after saying no, he'll either call or text talking about whatever drug he's doing at the moment and obviously sounding in a much better mood than before. (It sounds strange but he does this often- he called yesterday explaining how he took a bunch of vicodin by dissolving them or something)

I don't think he's addicted to an particular drug specifically, though he smokes weed every day now, multiple times a day, but I would say that it seems he's addicted to just being high. Every single day, without fail, he'll end his day with some sort of drug- pills, ecstasy, alcohol, cocaine, or whatever will get him fucked up.

I've tried telling him that his constant drug use can easily get out of hand and turn into an addiction and that I'm worried that he could overdo it one day, but he insists that I'm overreacting. What should I do to get him to understand that what he's doing is dangerous?
<bot>: I'm watching my friend distance himself from all of his friends and turn to using drugs daily. What should/ can I do to help him?