It always confuses me when people try to call out children for acting like a child. You were 16. Shock of shocks, you acted like a 16 year old!
I've been through a lot in my life. Getting clean was the hardest, because it's never-ending. Not just getting and staying off the drugs, but changing the way you think and react, finding all new coping mechanisms and rebuilding trust with other people, but also getting to the point of trusting yourself again, and feeling worthy of that trust.