Winger Young won the last of his 30 caps against Ukraine in September 2013.
But his form under Van Gaal has led to suggestions England coach Roy Hodgson might end that exile when he names his squad on 19 March for the games against Lithuania and Italy.
"The manager has been fantastic," said Young. "He gives you the confidence to play and confidence helps massively."
He added:  "I can only repay him with my performances on the pitch. That is what I have shown this season."
Young has been used as a full-back and at wing-back this season.
Van Gaal picked the 29-year-old former Watford and Aston Villa player in a more orthodox wide position in the 3-0 win over Tottenham.
Hodgson was at Old Trafford to watch one of United's best performances of the season - and a player who was an ever present at Euro 2012.
"Fingers crossed I can get myself back into the England team," said Young, speaking at a bwin event.
"I have always said I want to represent my country. It is an honour to play for England and hopefully I have done enough to get myself back into the squad.
"But I am concentrating on events at my club and we will just have to wait and see."

Englishwoman Evans, 29, is a 10-time ladies' champion.
Doherty, 45, won the tournament in 1997, but the world number 43 has not reached the third round since 2006.
The winner must make it through two more qualifying rounds to reach the main draw, which starts on 18 April.
The tournament has increased this year from 128 to 144 players. The top 16 seeds automatically qualify for the first round, with all non-seeded players starting in the first of three qualifying rounds which run from 8-15 April.
Evans received an invitation to the qualifying draw from snooker's governing body, the World Professional Billiards and Snooker Association (WPBSA).
Six-time world champion Steve Davis is also attempting to qualify. He faces Jamie Cope in the first round of qualifying.
Jimmy White, six times a runner-up at the Crucible, meets Thailand's James Wattana, while 2006 world champion Graeme Dott has been drawn against Mark Owens.
Defending champion Mark Selby is the top seed, with five-time winner Ronnie O'Sullivan seeded second - the two met in last year's final.
Ashley Young says Manchester United manager Louis van Gaal has helped revive his hopes of an England recall.
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Reanne Evans will face former world champion Ken Doherty in the first round of qualifying as she bids to become the first woman to appear in the main stages of the World Championship.