The Brazilian has struggled for playing time since joining the Catalans from Liverpool last January in a deal worth £146m and has failed to establish himself in the starting XI.
Rumoured with a summer move back to the Premier League, Coutinho told Spanish TV station Movistar+: “In the last few weeks, months even, I’ve not been playing well but I still want to improve.
"I came to Barcelona to give my best. I live for the moment. You never know what the future holds.
"I am happy with my performance (against Lyon)."
Coutinho, who was on target in Barca's 5-1 demolition of Lyon in the Champions League on Wednesday, has started only 16 league games this season, scoring four goals in the process.