Paris Hilton's Ex, Chris Zylka, Dumped by Fiancee, Actress Hailee Lautenbach

Paris Hilton's ex-boyfriend Chris Zylka is no longer engaged to actress Hailee Lautenbach ... TMZ has learned. Hailee tells TMZ ... "Ending the engagement was the best decision I've ever made in my life." And, if that response sounds familiar to…