The McLaren driver finished runner-up to Red Bull's Max Verstappen last season and is determined to build on a breakthrough campaign in which he took his first four Grand Prix wins.
Norris told the BBC podcast 'F1: Back at Base': "When that realisation kind of sets in of, 'It's gone', it's a tough one.
"This is what I've done since I was a kid, this is all I want to do. So, as soon as that kind of candle is gone and it's over, it hurts."
The British racer closed the gap to Verstappen in the second half of the season but was unable to overhaul his rival, although he thinks 2025 could be his big chance to land a maiden crown.
Norris said: "It's been a year where, actually, I've been pretty proud of my performance. Proud of performing under the pressure we've been under, delivering when I have.
"I've made my mistakes and, at the same time, I've learned a lot from those mistakes.
"So for us to go into next year, going, 'We have what it takes, we have a car'... I believe I'm a good enough driver and I've got everything it takes.
"I'm excited to go into 2025 knowing I've learned a lot, I've improved a lot and I'm ready to bring the fight to everyone.
"Confidence is something I've struggled with in the past and probably I've only built enough up throughout this season to go, 'I'm confident that I'm a good enough driver to win a championship next year', and I can bring a fight to whoever wants to fight me for it."