The 25-year-old says the Cottagers can now relax and approach their game against Newcastle without fear, knowing their Premier League status is almost certain for next season
The Costa Rican has scored three goals and provided six assists in his 18 Premier League games this season, helping Fulham to push for a top-half finish.
The attacker is cautious that Sunday's fixture against Newcastle might not be the game which pushes them past the 40 point mark, but feels his side can get a point or all three if they keep up their recent form.
"It's going to be a very difficult game as Newcastle really need the points," Ruiz told the club's official website. "But they have the pressure; they need to win.
"We are playing well so if we do the things we've been doing, then we will be fine and can play with no pressure.
"We really want to win on Sunday as it will put us in a very good position to try and catch ninth, eighth or even seventh place. We're looking forward to the game.
"The season started very well. We had a difficult period but now we are back in the game again. It shows how tough the Premier League is but the fact it is so competitive is what I love about playing in England."