Lyric discussion by Ricebandit 

Cover art for One & Only lyrics by Parokya Ni Edgar

This song explains my situation that I'm going through :/ When ever I try to just forget her I find myself coming back to her...sigh If only she knew

Anyweiz the song basically means that he falls for a girl and thought that she might be the one for him yet somehow his plan got backfired because she has a boyfriend. He tries to forget her yet he finds himself coming back to her