Luis joined the Blues for £15.8m from Atletico Madrid last July but has made just seven Premier League starts so far this season.
Jose Mourinho appears to favour the right-footed Cesar Azpilicueta at left-back, but Brazil international Luis remains content at Stamford Bridge and wants to see out his three-year contract.
“I’m happy at Chelsea. I want to stay at the club until the end of my contract,” the 29-year-old said.
“We have a chance to win the Premier League. Everyone wants to be there to try to help the team to win the league.”
Chelsea are currently six points clear at the top of the table with one game in hand over second-placed Manchester City.
They play Stoke at home on Saturday before making the short trip to QPR ahead of clashes with Manchester United and Arsenal and Luis admits they still have work to do.
“Is the title race over? No. It’s really difficult. We have nine games – really difficult games,” he said.
“The Premier League is never easy. We have to be better than ever because these games are coming up with a lot of pressure, but I think we’re prepared to cope with the hard situation we have.
“He (Mourinho) always says that to us – he has never said anything else.
“He always asked for everybody to be focused and concentrated in the games and to try to win every match we have.”
Watch Chelsea v Stoke live on Sky Sports 1 from 4.45pm on Saturday.