Nani has struggled with a lack of game time this season.
The 22-year-old joined United in a £17million deal from Sporting Lisbon in July 2007 and impressed in his first season at Old Trafford.
“It is very difficult at a club like Manchester United because there are so many good players here,” he told the Sunday Mirror.
“It is hard when you are not playing but I am happy here and I have confidence that I can be a part of everything.
“The manager has not said anything to me but I want to stay. I don’t want to leave and nothing has been said about leaving.”