Heitinga joined Everton in a £6million deal from Atletico Madrid.
“It was difficult [to leave] as it was my first year there,” he told Sky Sports News.
“I played every game and we were in the Champions League – but the feeling to play for Everton was big.
“I have come to Everton to play in the Champions League and I will give everything for every game.
“I am proud that I signed for the peoples’ club. When I travelled to Liverpool, the first time I stepped onto the training pitch, I felt one of them.
“It is a club with a very big history.”
