The Liverpool striker is due to face the Red Devils this weekend for the first time since sparking a race row in October last year.
A Premier League fixture at Anfield saw the Uruguayan accused of racist abuse by United defender Patrice Evra.
An independent regulatory commission found him guilty of the charge and he had to serve an eight-match ban.
Suarez marked his return from suspension on Monday as he stepped off the bench during Liverpool's tame goalless draw with Tottenham.
His next outing could come at Old Trafford in what promises to be a tense meeting with title-chasing United.
Suarez is aware that his presence is unlikely to go down well with the home support, but plans to use taunts at him as added motivation.
"I was not depressed at all," he told Radio Sport 890 in his homeland.
"I knew what I did and there is a kind of football law that says 'what happens on the pitch, stays on the pitch and that's the end of the story'.
"I know against Man Utd it is going to be tense because I'm going to face Evra. But I'm used to having fans whistle at me.
"I hope nothing unusual happens. I'll have to forget what happened for that moment.
"I do know Man Utd fans are going to try to make me feel uncomfortable. But I have to tell them, they are going to spur me on if they whistle at me."