After helping Roberto Mancini’s men clinch a Champions League place, the defender is now eyeing cup glory against Stoke and a third-placed finish in the Premier League
The full-back was part of the team that beat Tottenham to confirm their place in the top four on Tuesday, and is now preparing to try to break the club's trophy drought when City meet Stoke at Wembley on Saturday.
Richards said: "It’s unbelievable – it almost doesn’t feel real. I’m so happy for the boys but we have fantastic team spirit in that dressing room.
"This could turn out to be the best week of my life, if we can bring the FA Cup home as well.
"To achieve Champions League football in such a short space of time after bringing in so many players is amazing.
"Now we just have to keep our feet on the ground and if we do we can bring home the Cup as well."
Richards, whose side have not won a major trophy for over three decades, also believes City could beat Arsenal to third place in the Premier League.
"There’s a chance because we’ve got two games left and we’re just two points behind them [Arsenal]," he said.
"But we’re just going to take each game as it comes – the main thing is that we’ve already qualified for the Champions League and nobody can take that away from us."