Romeu said that he is aware of Valencia's interest in signing him permanently, but did not rule out the possibility of a return to his parent club as he still has a year to run on his contract.
"I'm very happy here," he told Marca. "The latest we know is that Valencia are happy with me and they would like me to stay.
"I'm very comfortable here, but we'll have to wait until the end of the season. I still have a year on my contract and anything can happen. It's up to Chelsea to decide."
Romeu has made 10 league appearances since joining Valencia.