The 32-year-old made his first appearance for the club in 612 days on Monday night for victory over Liverpool.
He told the Daily Echo: "It's been a strange few years, it's been a tough few years.
"Obviously it's a club I love a lot. I had some fantastic times here in the past and I've always been keen to come back and try and play here.
"That's all I wanted to do in the summer. I wanted to come back and give it a go and everyone's been fantastic with me since I've been back.
"But obviously the team has been doing well and Al's been doing well so it's just important I can help the team and the club in any way I can.
"I train hard, work hard, try and help the team any way I can when I'm not playing. Obviously the team has had a fantastic start to the season and it's just one of them.
"You've got to do what you can to help the club whilst you're here and just take it week by week really.
"You never know what's going to happen – injuries happen and with COVID people can be ruled out, so you've just got to be ready for when you do play."
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