The London club take on Cardiff City in the play-off semi final, as they failed to gain automatic promotion.
The Cottagers had to win against Wigan Athletic, but only managed a 1-1 draw.
Fulham have not lost a game in seven matches, and will go into the Cardiff match with a lot of confidence.
Parker said after the Wigan game: "Positive [feelings], a real positive because we were realistic and certainly the way we framed it was realistic.
"We knew what we had to do tonight and to bring the season to the last game was a massive positive for us. We took it to the wire, it's not happened for us, we knew it was well out of our hands tonight.
"We all understood it was likely we were going to the playoffs. We lost two games out of lockdown and since then we've been in very good form, that's seven unbeaten now. When you're close there's an element of 'can we do it' but you're relying on other teams to slip up.
"We move on. You'd expect me to say what I'm saying, but it is a big positive, that's where we are and we go in in good form with momentum with us. A good performance tonight, second half we had a real bit about us against a team needing to get a result. We move on from this now.
"It wasn't meant to be for us, we'll be focussed. We'll push in a tough game against Cardiff and we'll go from there."