Perez hit a hat-trick in victory over Southampton on Saturday.
“In the summer, there are going to be options," he said. “That means I have done something well. I'll be up for hearing what is coming, but it doesn't mean I am going to leave 100 per cent at the end of the season.
"It is going to be a difficult decision and depends on a lot of things."
Perez's goal haul against a Southampton side who started sluggishly, but looked the better outfit for much of the second half, took him to 11 for the campaign, one ahead of Salomon Rondon.