
It is strange that Simon dosen't show an signs of withdrawal symptoms or did I just miss that part !!!

He is suffering them. That's why his toilet got clugged, he was throwing up.
Also in that same scene he thinks about drugs. Maybe that's why he also lose weight (as said by Conor).
He's handling by himself in secret, but I do too think he's not as bad as he should for someone abusing that hard in heroin and stuff.
Really wish you could rate a series with negative stars. I’m not even the type of person to typically write comments but this was awful. He just let him get away with everything. Not going to lie, but I also feel bad for his ex boyfriend and their classmate mate.
Bro was crazy and he still gave him a second shot.