So apparently Rita Ora gets around!!! The cause of their break up was over her CHEATING with 20+ men..... A source said

"It’s really sad – they really liked each other but with him living in LA and her over in London, it was becoming impossible to maintain a relationship. They’d only decided to go public with the romance a couple of months ago so as not to put any pressure on themselves, but they’ve already split. Rob has now deleted everything on Twitter that reminds him of Rita."

Rob was really pissed I mean who wouldn't be check out his sub tweets below about Rita!