The "Sorry" hitmaker - who previously dated the brunette beauty on and off from 2010 - was recently filmed hitting out at Gomez's new beau The Weeknd,.
But Gomez thinks Justin is jealous of "what he doesn't have", and has "missed the bus" when it comes to their relationship, reported Hollywood Life.
"Selena is well aware that Justin wants what he doesn't have, but as far as she is concerned, he's missed the bus one too many times," a source said.