According to radaronline.com Rita Ora tells the January issue of magazine Glamour why her relationship with Rob Kardash didn't work. She says "I'm not going out with Rob," "We were close for a while, but it didn't work because I was never there. I was like a ghost." 

Rita also called Rob an inadequate lover Rob's response was... "So you let me get you pregnant and you let others hit it raw?"

Rita then said she's never had love "I have had young fascinations but never love. I think it's my only weakness. I'm scared of letting my guard down, and if I feel in love with someone now, he'd have to try ten times harder to break it down."

Ouch this must all be so painful for Rob to find out over countless interviews and tweet wars!