"There's a lot of disappointment in the dressing room, we felt those were three really soft goals to give away," said Purse after Saturdays game.
"To score two goals away from home and not get a point is bad, the lads are gutted, but we've got five games left, so we've got to lift ourselves.
"We knew what to expect here, the pressure was probably on them as well. They're looking over their shoulders at the bottom of the table, so it was always going to be a bit of a battle.
Cardiff's play off challenge is all but over now with Preston so far ahead. It's not impossible but very unlikely.
"We're down, but, when we're back in training, the banter will start again and we know we've got five games to go and we want to get as many points as we can," Purse continued.
"Come the last day of the season if we haven't got enough points, then so be it. All we can do is keep playing the way we're playing and hope it's enough. If it's not there's always next season, we can build on the performances we've had this year."