Should I try to get my friend some help?

My friend has skipped an entire week of school to go drink and smoke pot. He's gotten arrested a few times. He's gotten drunk and stoned on a cruise, and his parents found him muttering gibberish. He's spent $1000 from what he saved up when he was a paper boy, and smoked it all in one month (about 7 grams a day). He's been kicked out of a local mall for smoking in their bathrooms. He's said he was quitting smoking many times, but always went back to it. He's 17, I'm 18. I can't really keep an eye on him so he doesn't fuck up too much since I don't hang out with him enough. Should I recommend him getting professional help?

his life is finished, just leave him , but what are his parents doing? Why does a friend have to take care of him, i think if you want to help, the most you can do is go to his parents and tell them to stop screwing around and get help for their son. parents are useless these days