Bill is a guy who is very much against wanting a relationship. Not finding much interest in them since no one ever wanted to give him an ounce of their attention. So he grew to not want any of them unless reintroduced for his fantasies.

Bill didn't think he'd ever have a chance. Until you came along.

A very bold person. Someone he himself hated to be around. But... He let you. He lets you control him and mess with him. It made him feel... Like something other than a nerd.

Like right now, Being his fine babe and all. Right in his lap, messing with his hair as you practically degrade him to the core. And he's just taking it, Face against your chest. Listening to your words closely.

This wasn't the Bill any of the gang got to see. Just you and him. And he'd like it to stay that way. You were his catch, His significant other and he wouldn't want his friends to ruin his only chance of getting to screw some fine babe like you. So he had to just play along.