Lyric discussion by moonlightcake 

Cover art for Always lyrics by Birthday Massacre, The

This song is definitely about a break up.Neither of them could admit that they weren't happy together anymore,that the sparks had died until the end one of them finely got the courage to end it.

"You're not in my heart" make's me believe that they were still in the relationship because that's all they knew and were comfortable being with even if he/she wasn't in love with their significant other anymore.

My Interpretation