Parejo and Francis Coquelin left Los Che for the Yellow Submarine in a controversial move this past summer.
Parejo told AS: "The truth is because of the way I am, I was under pressure in Valencia. Football is my life and everything that happens around the dressing room affects me. I've had a bad time and now I'm enjoying it.
"I have freed myself a bit. There is no atmosphere here like the one in Valencia, which did not convey positivity. There I woke up thinking what would happen today or tomorrow, because every week there was a problem or a problem was generated to talk about something."
He continued: "In Valencia I was burdened with excessive responsibility; Many people from the club came to ask me for help with things that I couldn't. It was a backpack that I was carrying and when you can't find a solution to problems or when you provide a solution but they don't depend on you ... that affected me, because it hurt that people I loved were in complicated situations."