PLZ help...I heard this SONG and I need what it is

Alright so I heard this song at Hollister the other day, and I need to know what it is. yes, i know you can check them computer there, but I was working and couldn't go to the computer. So anyway, its like a punk/pop song like most Hollister music, and the chorus begins with something like "I love you better/more than he does" or "He doesn't love you the same as me" or something to that effect. It's NOT a really slow song, so that could help you narrow it down. I just remember hearing it, and thinking it would be a PERFECT song for this girl I know and our current situation, soo thanks a ton in advance.

AHHH, no one knows the song?