The midfielder is on-loan with Boavista this season.
He told the Independent: "It's such a special club but I just wanted to be able to play and express myself.
"I was offered a great contract, I had all my family and friends around me, but I decided that I was willing to sacrifice that to pursue a different path. It's hard to understand how difficult a decision that was. I'm still a United fan.
"I still watch every game now, whether it's the first team or the U18s. I could have stayed and gone out on loan but it just felt like I needed a fresh start."