Hollywood star Christian Slater has reportedly broken up with his girlfriend, Tamara Mellon.The actor began dating Mellon, president of designer shoe brand Jimmy Choo, while he was acting in a stage show in London's West End theatre in 2007.Gossip reporters previously reported that Mellon, who lives in London with her daughter, Minty, was planning to move to Los Angeles California to be closer to Slater. And last month rumors circulated suggesting the couple could be on the verge of marriage. But now the couple is have allegedly called off their relationship, after struggling to maintain their long-distance relationship. A source tells Britain's Daily Mail, "We all thought Tamara and Christian were made for each other, but the pressures of their respective careers meant they were spending too much time apart.""Tamara always puts her daughter first and with two businesses -- her shoe brand Jimmy Choo and American fashion label Halston -- to run as well, it's all been too difficult. Tamara speaks very fondly of Christian and I'm sure they will stay good friends."