He has urged the Gunners to learn from last term.
"I had the best season I've had in a long time," he said. "I have scored a lot of goals and got more assists.
"As a team we weren't able to perform to our abilities in the last few games. We should have got third but it was just snatched away from us.
"We have only got ourselves to blame on that front. We have to win trophies but I think we can do it next season."