The 49-year-old managed Belgium's so-called "golden generation" for four years but failed to deliver at two major tournaments during his reign. During this time, Lukaku believes he was never fully trusted by Wilmots which ultimately led him to not wanting to being selected for national team duty, despite being chosen as their main striker regularly.
"He is going to be even closer to me than he was as a player so it is just an emotional moment because it is the end of a career of a fantastic player". I also play [Daley] Blind, [Eric] Bailly and [Juan] Mata.
Coach Marc Wilmots of Belgium and Romelu Lukaku.
He continued: "In that type of situation, you tell yourself "f*** off, leave me at home, don't pick me".
The Manchester United striker played under Wilmots for four years at global level, though the country's golden generation failed to deliver success at two major tournaments during his reign. "I have every player apart from [Marouane] Fellaini and [Romelu] Lukaku available".
Roberto Martinez took over after Wilmots's departure and successfully steered Belgium to this year's World Cup in Russian Federation.
The Manchester United forward felt he was only selected because he was playing well rather than his manager believing in him, which every player needs, especially at worldwide level.
Lukaku impressed in qualifying after finding the net 11 times as his country became the first European nation to qualify for Russian Federation 2018.
The 24-year-old centre-forward traveled to Antwerp in Belgium to continue his rehabilitation for the remainder of the season.
However, Mourinho is hopeful to have the striker in the squad for next weekend's final at Wembley Stadium.