See You Around, Stranger

Hello, today was a nice day outside. Woke up this morning freezing. Today I lost touch with a longtime friend, he was actually the only friend I had for years, about 10. We first started talking in early or late 2009 and have been friends since. We were even calling each other brother and sister, he was like another little brother and I was like his big sister. I was there for him when he went through a bad breakup and he wanted to commit suicide. I talked him out of it and he was happy and doing better.
He was there for me when I was stressed, depressed, and after my own breakups. He would even help with money if I needed it, usually to pay bills and get groceries when we had nothing at all.
This year, he met a woman and I was happy for him, as long as he was happy too. Suddenly, when he got with her, we no longer talked anymore. He would say he would help with money issues and nothing, which is fine. It's not the first time actually. Anyway, the only time he would message was just to tell me about his relationship issues. Once again, that was alright too.
About a month or two into his new relationship, I learn that she has him on drugs. I had no problems with him and pot, I don't mind if others do smoke, it's an herb. But she also got him on coke and meth. I credit those to the reasons why he withdrew and it was very obvious that his girlfriend did not like me at all.
I wasn't gonna make him choose between our longtime friendship or his girlfriend because I already knew what he would choose.
It's hurtful to lose someone you care for to that, same with many other things. I haven't ever done drugs before because I've seen what it does to people.
I hope that he doesn't let it ruin his life, and I hope he has his best judgement in that relationship. That he quits the damn drugs before he's too far gone or before something happens.
It's his choices however, it is his life. I love him like one of my own siblings and like them, I don't want him to do drugs that will end badly. I just hope he does his best to be better.
I know I couldn't always be there for him, including now. The last relationship he was in, he didn't listen to anyone about her and it turned out she was cheating on him the entire time. Me trying to talk to him about his current relationship now and the drugs and repercussions won't do shit. He will (very) likely get pissed at me and tell me to let him live his own life.
I was like a big sister to him but now we're like strangers, so I gotta let him live on his own terms. He's an adult, he no longer needs me to be there.
I hope for him, happiness.

Love
Ariana