"I've been heartbroken and rejected and felt frustrated, and been with someone who couldn't be honest with me," Brook told Britain's The Guardian newspaper. "People stay in relationships for longer than they should. Sometimes they don't know how to get out of them and sometimes they try and treat the other person badly rather than just saying, ''I don't want to be with you anymore.''
"Or they wait for someone better to come along. But for whatever reason, because human beings in general are needy, clingy people, it's a bit bold to just break away from a relationship and launch into the unknown," she added.
Brook is currently dating British rugby star Danny Cipriani.