Clinger (2015) online

Fern Petersen, a driven high school senior, has her life turned upside down when her overly affectionate boyfriend, Robert Klingher, dies in an embarrassing accident. When Robert returns from the dead as a love-sick ghost, he tries to reunite with Fern - only to have his heart broken. As Robert plots to kill Fern so they can be together forever, Fern will have to fight to stay in the world of the living. Clinger is a blood-soaked coming of age story about the horrors of first love.