The midfielder, a January signing from Blackburn Rovers, has been impressive for the Eagles and is being linked with Bayern Munich.
After victory at Wolves, Wharton told the club's website: "I think it's been very positive. You can see the way we're playing now especially.
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We're playing some good football, we're getting the results and we're building a bit of momentum.
It's been great for me. I feel as though I'm getting better every game. As well as the team playing together, we're getting better with the new system.
It's maybe not the best time for the season to end but I'm sure next season we'll hit the ground running again and we'll try to improve on this season."