"I find it difficult to watch F1 races," he said. "I miss racing, that is the biggest problem. After the race, when I am at home, I think I am living a boring and monotonous life."
Kubica sustained an injury in a rallying accident prior to the start of the 2011 season that led to his right forearm being partially severed.
The Pole has rehabilitated to the point of being able to compete in rallies again.