Venomous by Christopher Krovatin

Locke has anger-management issues - he calls his issues "the venom." He has one friend, Randall. Locke's world is one of self-imposed isolation, until Randall invites him to a party where he meets goth girl, Renee. While Locke is dealing with the loss of his absent father, Renee is dealing with the death of her parents and a brother, Andrew, who has anger issues of his own. Locke finds himself at the cross roads where he can choose to change his ways. While there's no easy answers for teens dealing with serious issues, this novel offers hope that it's possible to change.