Lyric discussion by write_me_off;love 

Cover art for Blame Me lyrics by Dropping Daylight

to me this sounds like he just got sick of the way his girlfriend treated him. like she acted like such a victim and no matter what she had to blame someone else for her mistakes and the way things were. then once they were over, she tried to blame him for their ending just like she had tried to blame him for everything else. and hes accepting that she will blame him but hes not letting her get to him.