Bill couldn't feel anything.
For as long as he could remember he's never been able to feel emotions.
Even when he was with his family he felt nothing.
When going out of his house and into his home town "Gravity Falls Oregon" he acted normal.
When being surrounded by his family… he acted normal even though he knew he wasn't.
Bill knew that he was broken but he kept it to himself… he didn't care about it.
Not feeling anything was normal for him so why would he have any reason to tell anyone about it?
But everything changed when Bill met him…
Dipper Pines…
his Senpai.
For the first time in his life he felt something a strong desire, a longing, a yearning, a craving.
He finally understood what it meant to be human… to be alive!
Bill found that he was addicted to the way Dipper made him feel… He didn't care about anything else!
Dipper was and forever the most important thing to Bill.
There is nothing he wouldn't do for his Senpai.
Bill didn't care what he had to do, he didn't care who he had to hurt.
He doesn't care about how much blood he has to spill.
He won't let anyone take Dipper away from him.
Nothing else matters, NO ONE ELSE MATTERS!
Dipper… will… be… his… he doesn't have a choice.