Prince of Air and Darkness by M.A. Grant

Phineas Smith is the only human at a Mathers University, the power of the ley lines run through him. A place for a magical folk, the Seelie and Unseelie have an awkward truce on the grounds. Roark is Prince of the Unseelies, Phineas’ roommate and a pain in his ass. He always turns up when Phineas is being attacked by a monster and saves his ass, but complains about it the entire time. Someone is trying to upset the balance though, the Unseelies are getting attacked and the power-hungry want Phineas’ power.