The 34-year-old midfielder helped Birmingham City to win the Carling Cup by beating Arsenal at Wembley on Sunday.
Lee Bowyer: "We will see what happens in the summer.
"I am still hungry, I think I have got another couple of years and then...I don't know.
"But, if next summer I wake up one day and I suddenly feel like I don't enjoy it, that will be it.
"I thought they might give me another year, when it was brought up.
"They just said 'no'. They just said 'we're not prepared to offer you anything yet'. Basically a 'no'.
"It won't alter the way I play. I always give my all. I'm the same, no matter where I have been.
"I don't think anyone who I have worked with, or a fan, could say that they have never seen me give 100%.
"That's the way I am, the way I play and train."