Harry Styles' roving eye cost him his relationship with Taylor Swift.

The 23-year-old country superstar, speaking with April's Vanity Fair, said at the beginning of their courtship, Harry "was all, like, ‘You’re amazing -- I want to be with you. I want to do this.’

But in time, she realized "he was looking at every girl" that passed by during their brief winter romance -- and was even caught kissing one, though he claimed it was just a friendly kiss. Taylor said she was ready to call it quits right then, but the One Direction singer "wore her down" successfully for a second chance.

She said on another occasion towards the end, 19-year-old Harry "disappeared one night, and after that it was like he just didn’t want to keep going."

As we previously reported, Taylor famously broke up with Harry in January after