Was Miley bashed by her ex?

Miley once sang the "7 Things" she hated about Nick Jonas. And now, Miley's learning what it's like to get bashed by an ex in a break up song! In his new tune "Paper Hearts," Miley's former BF Justin sings all about their split- and he's def still bitter over how things went down! "Things will be a lot better if I never see you again," sings Justin. "You walked away and left me with a paper heart." Yowch! "You can always tell when someone's getting ready to leave you," Justin says about the song and Miley. "But you try so hard not to believe it."