The 20-year-old Wales international has been linked with a number of Premier League clubs, but says that he wants to stay with City as they bid to continue their climb up the Championship table.
"I'm probably playing the best I've played this season," he insisted.
"I am happy where I am at Cardiff. If they accept a bid then I will be gone, but it's up to Cardiff.
"Everybody wants to play in the Premier League. Hopefully I can do that with Cardiff."