Jasmine Waltz says Lee Ryan is a "100 per cent screw up".
The 'Celebrity Big Brother' star has claimed she dumped the Blue singer - who she had a fling with after they met on the reality TV show - because it was "emotionally draining".
She told The Sun on Sunday newspaper: "Lee is a 100 per cent screw-up mentally.
"He told me he loved me and wanted to marry me. But behind the candelabra everything about this life is bad .... Being in a relationship with him was emotionally draining.
"I couldn't get a word in edgeways as he talked about how his career was on the rise."
The 31-year-old actress claimed Lee "needs to get help", insisting he has delusions about his band's success.
She added: "Lee genuinely thinks Blue are Number 1 in the charts, are as big as One Direction and he has the appeal of Harry Styles.
"He cannot accept his career is going nowhere. It is tearing him apart and he needs to get help."
However, Jasmine suggested that "deep down" he is more honest with himself.
She said: "Deep down he knows his career is pretty much over and he is lashing out.
"Blue know it is over. They want to keep touring, but have no label."