Ade told the official web-site: "A few clubs know that I haven't signed a new contract yet and that's alerted them".
Ade still has one year remaining on his contract, but would like to sign up long term as soon as possible.
"I met with the gaffer yesterday and told him that I want to stay here for the rest of my career and he wants to keep me here so we'll have to see what happens.
"Talks have been ongoing since the summer and I don't know what's delaying it but I'll keep banging away until I get a new contract."
He added: "I got a family to think about and they're settled and I love the club, the fans and everyone at the club and I don't want to have to move."