If Lukaku can continue with his performance then he is an important player as he had 16 scorer points in total in roughly 20 games I think. That is remarkable considering that he came from Chelsea and had lost all his confidence. He should not start any new experiments in his career and either stay with Inter Milan now and try to negotiate a contract that lasts for a few years or he should do something completely different, but not go to a club in Eruope like he tried with Chelsea. At his age it could mean a bad ending for him if he can't continue with his performance and ends up on the bench again.
You mean Lukaku will be with Inter Milan next season. Well, everything must be well aligned with the development of Lukaku status at Inter Milan for now because Lukaku loan period with Inter Milan will end this month. So there must be more appropriate steps that must be taken by Inter Milan for Lukaku if Inter Milan still wants to use his services next season, namely by permanent Lukaku from Chelsea. If Inter Milan doesn't do that I think Lukaku will play for another team next season because Chelsea will sell him when his loan ends this month. Indeed, if you look at his performances this season with Inter Milan, of course Lukaku has made an extraordinary contribution to Inter Milan front line where Lukaku is the second player after Martinez to score the most goals in the Inter Milan squad. Lukaku future is full of uncertainty because Inter Milan does not have a strong enough budget to make Lukaku status permanent. That is what has become an obstacle for Inter Milan in this matter.
Right the loan is over and Inter Milan would have to make an offer that Chelsea accepts. But Lukaku could get into a complicated situation when Chelsea received an offer from Saudi Arabia that is above that from Inter Milan, Chelsea would want to sell him to Saudi Arabia but he doesn't want to go there. But if he stays in Chelsea and Pochettino already made clear that Lukaku isn't part of his plans, he could end up sitting on the grandstand and not even be nominated for the games in the Premier League. That would be the worst case scenario for him but also an asshole move by Chelsea.