Hilton, 31, and Afrojack, 24, were dating each other for six months and it is believed that he is too busy with his life, reported Daily Mail online.
The reason behind the break-up is believed to be Afrojack's reluctance to settle down. However, Hilton's representatives have denied the couple ever dated, reported Daily Mail Online.
"Afrojack had moved into Paris' Beverly Hills mansion earlier this year, and the two got very serious. But he just wanted to have fun and not be exclusive with anyone. He is on the road practically every day performing in clubs all over the world, and he just isn't ready to settle down, whereas Paris is," a source close to Hilton said.
"Paris is having a hard time adjusting to the fact that she just doesn't have the popularity or cache that she did five years ago. Paris has tons of money, but that isn't enough for her," the source added.