Lingard's only Premier League goal for the season came in the closing day victory over Leicester City, which sealed a third-place finish for the Red Devils.
And the 27-year-old took to Instagram to open up on what has been a tough season.
He wrote: "This season has been difficult for so many reasons. I lost who I was as a player and person, but I never wanted to give up, I knew who I really was on and off the pitch and knew that having been there before, I could get there again.
"This meant working harder than I'd ever done before and trusting in those around me that they knew how to best help me achieve that.
"I know the fans have been frustrated but in all this time my love for this club and everyone connected to it has never left me.
"This team, this club is my family and I will continue to keep working harder than ever to help this team achieve its goals."