George Friend says the disappointment of a second Riverside defeat in a week was compounded by Boro's dominance for long spells against Preston.
"It's disappointing because that's two home games in a row where we've gone one up but not taken any points," he said.
"Today we controlled the game until a game-changing decision.
"We had chances before that as well so it's disappointing we couldn't capitalise.
"They are the positives and we have to move on because there are a lot of points still to play for."
Watch the full interview with George Friend in the video player above.