"Manchester United are a great club and I don't want to go anywhere else," said Fletcher, who was heavily linked with former Scotland boss Alex McLeish and a move to Birmingham.
"I just go into every game and do my best in the hope it is enough to keep me in the team."
After scoring just nine times in his first 172 appearances, Fletcher has hit a rich vein of form during the current campaign.
He added another in the draw at Everton the following month and, having been given licence to attack even more this term, is confident of adding to his tally.
"It's great to add goals to my game," said the Dalkeith-born star.
"I would love to sneak a few more as well but the most important thing is actually getting into the box and making the chances.
"The manager has been very encouraging and I have a lot more confidence to try my luck.
"In the past, I may have been a little too worried about holding my position and watching for counter-attacks.
"But now I am more selfish and a bit more adventurous."