"I'm not going out with Rob," said Rita, 22. "We were close for a while, but it didn't work because I was never there. I was like a ghost."
All of the Rob's tweets were subsequently deleted.
In the chat with Glamour, Rita said that while dating the oft-overshadowed reality star, she "used to get so frustrated with myself and then wonder why I was angry, so I decided it was best to keep it friendly -- especially at the moment, when there's so much going on."
The singer also admitted she's never been in love.
"In 22 years, there's been nothing," Rita said. "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."
Single again after parting ways with the Dancing with the Stars alum, Rita told Glamour the three traits she finds essential from a partner.
"For him to make me laugh, tell me I'm beautiful once in a while, and be there for me."