The 30-year-old, whose contract expires at the end of next season, scored the winner in Tuesday's 2-1 victory against Aston Villa to keep the pressure on Premier League leaders Manchester City.
Liverpool are level on points with City, who play Wolverhampton Wanderers later on Wednesday.
Sorting out Mane's future is a key task for manager Juergen Klopp, who has led them to success in the league, Champions League, UEFA Super Cup and Club World Cup.
Asked by Sky Sports whether he had ever been happier at Liverpool, Mane said: "Yeah, sure, when we won the trophies I think I was happier.
"But I think I just try to enjoy every moment and try to score and assist for my teammates. I think it is all about the team or nothing, the boys make it easier for me so I am obviously very happy."
League Cup winners Liverpool, who are also in the Champions League final, can win the second trophy of their campaign when they take on Chelsea in the FA Cup decider on Saturday.
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