Willian admits it's upsetting that he will be leaving Chelsea.
The midfielder has declared he now expects his contract to expire in June with talks over a new deal at deadlock.
"Really a very beautiful story that I built at this club, I have a very special affection for the fans, for the people who work there and I identified myself a lot here," he told Brazilian publication Expediente Futebol.
"Everyone knows that my contract ends now in a few months, so the renewal is really a difficult thing to happen.
"I think it will be very difficult for me to renew because Chelsea offered me two years, I asked for three and it ended there, we didn't talk anymore, we didn't negotiate anymore."