The Belgian international signed for Chelsea from Genk in January 2012, but was quickly sent on loan to the Bundesliga side.
He's yet to make an appearance for the Blues, and reports have suggested he could leave the club next summer.
He's now essentially ruled out another season with Werder Bremen, and he claims Chelsea have told him to move to a 'bigger club' if he doesn't stay with the Stamford Bridge team next term.
De Bruyne told Suddeutsche.de: "Chelsea have told my agent that I should move to a bigger club if I do not stay at Chelsea in the summer, and that I should play at a higher level.
"I have had a good year here, had fun, and played at a good level."
The 21-year-old has been in good form in Germany, scoring six goals from 27 Bundesliga starts for Werder Bremen.
But although Chelsea have told him to move on to a higher level at the end of the season, the German club remain hopeful they'll be able to convince the on-loan starlet to stay with the team for another year.
Werder sporting director Thomas Eichin said: "I just spoke to Kevin's adviser Patrick de Koster. He has shown me the situation is different."
De Bruyne is one of several young Chelsea stars on loan. Romelu Lukaku has impressed at West Brom while Lucas Piazon is with Malaga and Jeffrey Bruma is also in the Bundesliga with Hamburg.