Lukaku admitted he does not know where his future lies next season, although he would be open to the idea of returning to West Bromwich Albion on loan.
"I just hope I end this season as well as possible," he said. "Then we'll see what happens. I also need to think about the national team and not of myself.
"So if I'm on loan for another year then, okay, good. That wouldn't be a bad thing. Playing for Chelsea is my final goal but I'm realistic, next season I'm 20 years old."