Beyoncé Knowles is too busy to marry Jay-Z.The couple have been at the centre of wedding rumours for months but a friend close to Beyoncé claims the pair won't be walking down the aisle anytime soon.The source said: "They are still very much an item and in love, but there will be no summer wedding - or any wedding this year for that matter. Jay wants to settle down, but Beyoncé is not about to step off the gas as far as her career is concerned."She told Jay he is going to have to wait a while before she is ready to walk down the aisle."Although wedding bells aren't ringing for the couple just yet, Beyoncé does want to tie the knot with Jay-Z.The singer-and-actress, who has been dating the rapper for around four years, recently admitted she wants to settle down and have a baby.She said: "Of course I want to get married. My parents have been married for 27 years, and they're still in love. That's a great example for me. I know it's possible. I think about the future, I want to have a family. I want to be happy."