This has been the toughest decision of my life, one both me and my family have agonised over for a good deal of time," said the ex-England midfielder.
My decision is completely based on my wish to experience something different in my career and life and I also want to make sure that I have no regrets when my playing career is eventually over.
"From now until the last kick of the last game of the season, I will be as fully committed to the team as I ever have been and giving everything I have to help Liverpool win games