Messi came off the bench to make his first appearance since November in the midweek 4-0 win over Getafe, the Argentine forward marking his comeback from a hamstring injury with a late double.
The 26-year-old has been linked with a surprise move away from Barca this season following a row his contract with the club's economic vice-president Javier Faus.
"My idea is to stay here and finish my career at Barcelona," Messi said.
"I played 30 minutes and the truth is I felt very good and without pain," he added.
"It did me a lot of good to spend so much time in my country and with my people. That has allowed me to recover from this and come back with great enthusiasm. I hope this will be a great year for everyone.
"If I can play against Atletico, I will. I'll talk with (head coach) Tata (Martino) and the doctors.
"I always think of the club, I have the same desire as always."
