The Flatliners have been playing music together for ten years. After forming in high school the band began touring by age 17 and were signed to Fat Wreck Chords at 19. Now at 25, The Flatliners spend most of their lives on the road, connecting with fans and playing the music they love. We talked to frontman Chris Creswell about feeling “like an old man at the ripe age of 25,” meeting Fat Mike for the first time and the band’s new, “more concentrated” upcoming album. Public Records: You guys have been playing together since you were teenagers, how has that influenced the way you play and create music? How…