Lukaku is back at Chelsea after enjoying a successful spell on loan at West Brom.
The Belgium international has revealed he has held talks with Jose Mourinho about his future at Stamford Bridge and he is determined to establish himself in the Portuguese's first-team plans.
"We spoke and I want to keep it private because when you have confidential talks with the manager, it has to stay between you and him," Lukaku told Sky Sports News. "We had a good talk and now it's up to me."
Asked if he would consider another loan move this season, Lukaku said: "No, not at the moment.
"You never know in football but my mind is in Chelsea now and I have come back to do well in pre-season and if I do a good pre-season, I think I will have a place in the squad and hopefully in the starting 11.
"Last year I had a great season at West Brom and I think have the qualities to do it here, but it is up to me.
"If I don't do well here, then loan again."