The Argentine has rubbished reports that he has lost his passion for the game and might be open to a move away from Camp Nou
The Argentina international has regularly come under fire in a campaign that has also seen his club struggle, but the 26-year-old was eager set the record straight at a corporate event.
“A lot of things have come out in the press over the past year, and practically all of it is nothing but lies. I am fine,” Messi told reporters.
The forward's sole focus is now on helping Barcelona retain their Liga title, which looked all but lost after last weekend's 2-2 draw at home to Getafe.
However, Atletico Madrid's subsequent loss to Levante, coupled with city rivals Real dropping four points in the space of four days, means that the Blaugrana's destiny is now in their own hands once again.
Indeed, if Barca beat Elche away this weekend, Tata Martino's men can then clinch the title by defeating Atleti at Camp Nou on the final day of the season.
“We are in a much better position now than we were a few weeks ago,” Messi enthused.
“There is a real possibility that we could win the league; it’s down to us. Winning the league depends on us alone; we have to make the most of the situation – we cannot let this chance slip away from us."
Barca currently trail the Rojiblancos by three points but given they drew at the Vicente Calderon earlier in the season, a win for the Catalans would see them crowned champions on account of a superior head-to-head record.