A "jilted lover" refers to someone who has been rejected or abandoned by their romantic partner.
Sentences with «jilted lover»
Don't forget that jilted lovers seem to think that burning down their ex's apartment is still a valid way to get their point across. (effectivecoverage.com)
Not many jilted lovers get to use that comeback. (politics.co.uk)
This is a common pitfall among people who don't get much attention IRL, those who are insecure, and jilted lovers trying to get over an ex. (hookupland.com)