We all have this void. We feel the need to close it, but it's nothing that can be closed, but it can be made smaller. To stabilize your mind is not as hard as some might think. The void won't feel as urgent as usual then.

For me it is vital to wake up every morning at the same time and do some sports in the week. That's all it took to not feel like shit.

Only 3 years ago it was the same for me, smoked a ton of weed and was very into trying different drugs. The urges got less and less over the time and now with 25 it's just more of a: do I really have the time to do it?

Enjoy your drugs, keep it as a fun activity. You obviously already realised that drugs won't fill the void, so start to try stuff that you really feel interested in. This is the hardest part btw. I'm not interested in anything, till I do it.