The England defender describes his time with the Blues has been a "whirlwind".
He says: "Being a northern lad and coming down here I thought I might be a bit lost, but I've enjoyed it. My family have settled well.
"It's a short career so you should go where you need to go. At the time I moved I was playing in the Premier League week-in, week-out, so the next step was to go somewhere where you're going to try to win things.
"The risk was that there were great players here - you've got David Luiz, who was captain of Brazil not long ago, and JT (John Terry) who has been captain for England and Chelsea for years and years. So you're not going to walk straight in.
"But you've got to take that risk. It's not very often you get the chance to come to a big club and try to win things."