Lyric discussion by deep in static 

Cover art for Up To Me lyrics by Five Times August

Brad said, "I was having trouble letting go of someone and in the midst of all my blaming her, the excuse that came out of her mouth was it was my fault for feeling hurt. She literally said "it's up to you to make yourself feel better about this" and as soon as that hit me the song wrote itself."

There's your meaning. :D