The Gunners were jeered at home on Sunday after defeat to Aston Villa.
The Pole told arsenal.com: "Obviously we know we can't win the title anymore, so your head does start to go down, but you couldn't tell in the dressing room that there was a lack of attitude," he said. "I believe that all the players in our team do have a good attitude.
"I wanted to be there. I want to play for Arsenal, and every time I put on the Arsenal shirt I'm buzzing. It's disappointing, but I am trying to look at the positives as well, and we had a change in attitude after the second goal, which is good."