Johnson has been struggling with injuries for a bout a year, but returned for Fulham as a substitute in the 2-1 defeat at West Brom.
“I’d never spent such a long period on the sidelines and it was very frustrating,” said Johnson.
“It was something mentally hard that I had to deal with.
“The fans mostly see the glitz and the glamour, the nice cars and the nice houses and all the other rubbish connected with football that appears in the newspapers and magazines.
“This was the other side of the game. For me, it was very tough.”
