The midfielder is set to join Ipswich Town for the new season.
"Of course, when you see the club spend millions on new players it is difficult to accept," admitted Celina to the Daily Mail.
"But Manchester City is a big club and they want to sign the best players around the world.
"My ultimate ambition is to have a career at City. I want to play in Premier League for City.
"Even if the club decided to sell me. I will fight for them to buy me back. That's what I want."