The 28-year-old was linked with a switch to Barcelona during the summer transfer window, but despite the Reds' acquisitions of defenders Kolo Toure, Mamadou Sakho and Tiago Ilori, the Dane stayed put.
"[The Barcelona move] was up to the club," Agger reportedly told Ekstrabladet. "The club would not sell me, and it was so. We can always talk about again later.
"I do not know [if I'll leave Liverpool]. Right now I have two-and-a-half years left on my contract, and I intend to fulfill my contract.
"I'm glad at Liverpool and playing well. We have a great team, and if I can win something it will be great. Liverpool is a huge club."
Agger has been at the Merseyside club since 2006.