The Aston Villa playmaker will play at his first major tournament for the Three Lions at this summer's finals and admits that his involvement is the completion of a dream.
Grealish said: "My number one thing was to try to break my way into this squad.
"I had my debut at the start of season so to be here is a dream come true. I will cherish every moment."
Grealish also praised England boss Gareth Southgate for making the experience of playing for the national team enjoyable.
He said: "He's the manager of England so he'll obviously be a brilliant coach," said Grealish. "He's helped my game massively. At the start of the season I said to him 'What can I improve on?'
"He gave me a few things to work on to try to force my way into the team. I think it's worked as I've had seven games since.
"I love coming away [to the England camp]. I've heard people say years ago they didn't really enjoy it. I think it's down to the manager and he deserves credit for that. We're like a group of mates playing together."
Grealish recalled his fond memories of watching England at previous tournaments and can't wait to experience it from the perspective of a player.
The midfielder said: "I remember watching Russia in 2018. It was crazy how football brought the whole nation together. Even my nan who never watches football was watching every game.
"I remember Euro 2004 when Rooney burst onto the scene. It sticks in the memory. You grow up thinking about these things and dreaming of them.
"It'll be unbelievable. My family are so excited already. It'll be a great feeling for them to watch me at a major tournament. Hopefully I get on the pitch and express myself at some point and make them proud."