The Dutchman's position is under scrutiny after another late lapse saw Cardiff claim a 2-1 win on Saturday, meaning the Cottagers are still without a home victory in the top flight since April 1 in a run which has seen supporters' frustration grow.
"The devil was playing with us. If you concede goals that late, it's awful," former Tottenham, Hamburg and Ajax boss Jol said.
"We are very close. It's not easy to win games.
"I can appreciate fans are getting a bit nervous, or other people. If they invest money in the club, they would like to be in the top 10.
"The only risk I can see is that we will still be near the bottom at the end of the season. I never did that (took part in a relegation battle). I feel I can keep them up, but it's not about me."
Jol, who guided Fulham to ninth and 12th in the last two seasons, is not happy with the jeers.
"That is a problem," said Jol of the boos.
"It's not helpful. That is what always worries me.
"It's bad, it's not good for your health. I've got a thick skin. I could easily say 'b***** off', but I won't do that. It's the reality of the Premier League."
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