Fellaini has played an integral part of Everton's charge up the Premier League table with David Moyes's side having constructed a nine-game unbeaten run in the top flight.
The Goodison outfit can move to within six points of their neighbours with a game in hand should they prevail in the 213th Merseyside derby this weekend.
Fellaini will be making his first trip across Stanley Park as an Everton player having missed both the Premier League and FA Cup derbies at Anfield last season through suspension. His recent performances have drawn praise from Goodison manager Moyes, who labelled the Belgian as "the best midfielder in the country" on current showings.
And Fellaini said: "Things are going well, and if pushed I would probably say it is the best form of my career. But the main thing is that the team is playing well at the moment not just me, so that's good.
"You come here for the big games like this. It's a derby, it's a great game, there's a lot of spark and crackle about the occasion and tension going into it. You can feel the build up, it's great.
"We are going in to it positively but I think the main thing we've got to do is concentrate on putting in a great performance. We've got to make sure we turn up and put on a good show. If we give a good account of ourselves then who knows?
"It would be great for our confidence for the rest of the season if we get a result."
Fellaini's consistently impressive performances have reportedly attracted the interest of a number of clubs.
Chelsea have been linked with a summer move for the Belgium international, but Fellaini insists his focus is on ensuring a successful end to the season.