The striker gave his farewell media conference yesterday ahead of joining Atletico Madrid.
In a social media post today, Messi declared: "I got used to the idea but when I walked into the locker room today it all just got too real. That it will be difficult not to share my daily life with you, on and off the pitch. We will miss you so much.
"All these years, these many mates, these meals, these dinners ... Lots of things that we will never forget, and all these days spent together. What a strange feeling when I see you wearing another jersey, and especially when I have to face you. You deserve to leave by the front door, a farewell at your height: one of the most important players in the history of the club, who has achieved real exploits both for the team but also individually.
"You didn't deserve to be released like they did. But the truth is that today nothing surprises me. I wish you all the best in this new challenge. I love you so much, I love you all so much.
"See you soon, buddy."