The Blues have endured a turbulent campaign, with the defense of its Champions League crown ending at the group stage and the club's Premier League title tilt failing to spark. But the Belgian, who has scored 13 goals in all competitions during his debut season in England, believes the west London club must atone for its past poor performances by earning silverware.
"It's been a good season for me so far but I could have done better in certain situations," he told the club's official website. "There have been good moments and bad moments, both for me individually and the team, but hopefully we can finish the season strongly.
"We're still on the right track to win both the FA Cup and Europa League, and we'll be doing everything in our power to make sure that happens because big clubs can only be judged to have had a successful season if they win one or, if they're lucky, several, trophies."
The 22-year-old went on to express his disappointment at Chelsea's failure to progress in the Champions League, and has underlined the importance of qualifying again this term.
"You have to reserve judgement until the end of the season," he continued. "You can't summarize or sum up until everybody knows exactly what's been won. But it was a big disappointment going out of the Champions League so early, particularly as the same thing happened to me with Lille last season, when we were eliminated at the group stage. It's such an important competition and that's why I feel we could have achieved a bit more this season.
"We're on the right path to qualify for next season's tournament, though, and I think if we do we have enough quality players at the club to go a long way in it. The ultimate objective is to go as far as you can in the Champions League."
After a string of recent impressive displays against Manchester United, Steaua Bucharest and West Brom in the Premier League, the former Lille man also revealed March is often a good month for him.
"My confidence is really up at the moment and I feel good in myself," he said. "It's quite weird because, historically, March always seems to be the best time of the year for me.
"Last year I got player of the month in Ligue 1, and a couple of years ago I won the same award. I don't know why but it seems as though things come good for me at this time of the season."