Sina Grace 
Ghosted in L.A. #3 [PDF ebook] 

As if living with ghosts weren’t enough of a problem, Daphne has personal drama she never expected. The jerk of an ex who dumped her? Turns out, not a jerk, because when he said "It’s not you, it’s me, " he really meant "I think I might be gay, and you’re not my type." So now Daphne has to be a supportive friend, get over a long term relationship, and keep her undead roommate from hitting on her ex.