You're The Problem, It's You By Emma R. Alban

There’s a fine line between love and hate.
Bobby Mason is sick of being second best: born the spare with the personality of the heir.
James Demeroven, is a Viscount who wishes he wasn’t one. His title brings far too much attention.
They can barely get through a single conversation without tensions boiling over. Neither Bobby nor James has ever met a more intriguing, infuriating, infatuating man.
If only they could avoid each other entirely.
But when an extortionist starts targeting their families, Bobby and James must find a way to work together, without pushing each other’s buttons (or tearing them off) in the process. . .