How did bloom and sky break up in winx club info?

Bloom and Sky's relationship isn't depicted as a breakup in the Winx Club series. They remain a couple throughout the entire show, enduring many challenges and ultimately getting married in the final season.

It's possible you're thinking of a particular moment or episode where they experience conflict or tension. If you could provide more context about what specifically makes you think they broke up, I might be able to help you further.