Lewis Hamilton insists he is happy at McLaren and believes the Formula 1 team can deliver this season, however the British driver says he is yet to make a decision on his future.The former world champion, whose contract with the British-based outfit expires at the end of the 2012 season, acknowledged rumours linking him to the rival Mercedes team, with Michael Schumacher expected to retire at the end of the season.LONG RELATIONSHIPBut Hamilton, 27, speaking on a visit to India, spoke warmly about his long relationship with McLaren, with whom he won the 2008 drivers' championship.Hamilton said: "There have been a lot of speculations and rumours about my move to Mercedes but I am happy with McLaren."We have a great car and we are in a position to challenge the top teams. We are definitely in with a chance to win the championship.”In Mumbai for a sponsors' event ahead of October's Indian Grand Prix in New Delhi, he said he would not be rushed into deciding on his next step.HAPPY AT MCLAREN"No, I haven't committed to any team as yet. I don't have a timeline either."I won my first world championship with McLaren (in 2008) and I am happy with their background, the people and environment there.”Hamilton is currently second in the drivers' championship behind Fernando Alonso, after his victory in the Italian Grand Prix at Monza, his third win this year.