City's dramatic 3-2 win against Aston Villa on Sunday took us to 93 points - one point ahead of Liverpool - and sealed a fourth Premier League title in five seasons.
The only other side to win the top-flight in that period was Jurgen Klopp's side.
De Bruyne believes the excellence of the Anfield club has made City even better.
"It’s hard because Liverpool push you that far that you have to be excellent all the time. Losing points means the end.
"That’s why it is that hard. That makes us proud. We managed to find a way."
When asked whether he panicked when Phillipe Coutinho doubled Villa's lead in the second half, De Bruyne was comfortable with telling the truth.
"Maybe a couple of times," he said.
"It’s so different you can’t explain it. You try to stay as calm as possible.
"I think for about 10 seconds you doubt yourself, then you just go for it.
"2-1 changed the whole situation for me. The stadium changes, the atmosphere, the players, then we just didn’t look back.
"Ilkay [Gundogan] and Zinchenko changed the game today."