The Spaniard has established himself as the first-choice left-back at Anfield following his £7m switch in summer 2011.
"Coming to Liverpool was one of the best decisions in my life, in terms of football," Enrique, 27, told LFC TV.
"Of course, I already played for a good club at Newcastle, but you can't compare one club with the other in terms of history.
"I'm really happy with my decision to be here; it's my second season and I'm playing a lot, like last year. I'm improving a lot as a player and a person as well."
Enrique has made 32 appearances in all competitions for Liverpool this season.