A year into his Blues career, the 24-year-old Brazilian international insists he is still enjoying every moment at Stamford Bridge, but admits things have not gone to plan on the pitch in recent weeks.
"We have had some difficult months on the pitch but everybody is focused on training hard," said Luiz. "The mentality of the team is so good and so strong, I am sure we will finish the season fighting for the first place in the table.
"We have a strong belief and the group is united, so if we can make a good run of wins we can challenge again.
"It is important that we work together while important players like Didier Drogba, Branislav Ivanovic and John Mikel Obi are unavailable to maintain our results."
Next up for Chelsea is a home tie against Sunderland, a match that Luiz is expected to keep his place at the heart of Villas-Boas' defence.
With the Blues expected to complete a deal for Bolton defender Gary Cahill before the end of the transfer window, Luiz knows he will have to be on his toes, as competition for places in west London increases.
"To come here was a big opportunity in my life and I love this job," he continued. "I want to stay here for a long time.
"For me the best thing is the people here who have become my friends very quickly. I will always remember the first time I pulled on the Chelsea shirt for a game and I still love doing it."
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