The Argentine's loan period expires at the end of the campaign and the striker has grown frustrated at starting many games on the substitutes' bench.
"I don't think I will be a Manchester United player next season," Tevez told the News of the World. "I do not feel wanted. I feel bad over my situation. I do, but it's very very difficult to stay any longer. I guess what I'm saying is goodbye."
Tevez, who joined United from West Ham in 2007, scored 19 goals in 39 appearances for United as they won the Premier League and Champions League [ Images ] last season.
Despite making 32 appearances and netting 13 times so far in this campaign, Tevez said United had made no offer to make his loan deal permanent.
"I have done everything I possibly can but they have never made me an offer or given me a contract so I have to leave. I don't think I deserve to be in this position but you realise if your time is up you have to go," he added.
"The fans treat me like family, but United have not signed me so they do not respect me as a footballer."
Iranian businessman Kia Joorabchian's company MSI own Tevez's registration.