Ramsey is expected to join Juventus once his contract expires in June.
Reports have suggested the move could be brought forward, but Emery expects to have Ramsey at his disposal for the remainder of the season.
"My idea and focus, I say to him every day, is with us," said Emery. "We need his performances for us and the last matches I am very happy with him.
"I asked him in the last match at Blackpool if he's ok to help us play, he said yes I want to play. He played with a big commitment to us.
"His future is individually for him, for his family, his agent. Every training day with us he is working very well and I want his behaviour and focus the same for West Ham on Saturday."
Emery added: "I respect his decision a lot. I cannot say more than this situation.
"For me the most important (thing) is Aaron Ramsey is with us. His future I respect a lot because it is a very private decision.
"But between him and us, I am very happy with him now."