"I feel good, I feel love from fans, I have everything. This country is special, I love this game a lot," he told BT Sport.
"Unfinished business? This is the pressure I give, it is not just about Champions League, I feel we can be better and improve our quality, extend it longer, we have not been able to do it in Europe but hopefully we can in the next years."
Asked why City have struggled in the competition, Guardiola added: "You know in Champions League, JT (John Terry) missed the pen in Moscow, you won, but it was fine margins.
"We were not good enough and were unlucky, we miss some details in the last years, there are exceptional teams in the Champions League."