The striker was a revelation this season on-loan with West Bromwich Albion.
"It is out of my hands now," said Lukaku in the Express & Star.
"I will go to the internationals, go on holiday with my friends and my missus and come back and train hard with my dad and then go to pre-season with Chelsea.
"We will see what happens. This club will always have a place in my heart. It's the club that put me in the spotlight and re-launched my career."