Kim Kardashian, Reggie Bush Split

"Nobody cheated," a source close to the couple says. "This is just a ase of conflicting schedules and their lives going in different directions.

See who else is single this summer.

"It was a totally mutual decision," continues the source.

The reality star, 28, began dating Bush, 24, the running back for the New Orleans Saints, in April 2007.

Look back at Kim and Reggie's most romantic moments.

In June of this year, she denied rumors of an engagement, as falsely reported by tabloid Star.

"I am not engaged!" she wrote on her Web site. "The rumors about me picking out my ring already are also not true! I don't know where all this comes from!!"