In a clip provided by Sony exclusively to Cinema Blend, Jonny Lee Miller says that Sick Boy is now trying to exist in a world in which he doesn’t really belong.
Jonny Lee Miller’s Sick Boy became a pimp and drug dealer, while being an addict himself, over the course of the original Trainspotting.
It would seem that while the character will have aged a bit in T2 Trainspotting, he won’t necessarily have changed all that much.
He’s trying to fool himself into believing that he’s successfully found his place there.