The song is about a relationship that is good and bad for you. The only analogy I can come up with off the top of my head is Guinevere from King Arthur's legend. You can't get enough of the addictive nature of the relationship but eventually that pleasure will bring pain to you and everyone in your life in spite of the momentary pleasure.
Lyrics
Can't get enough of that addictive taste
She's my favorite drug with her gorgeous face
Feelin so high when I take her in
She's my heroine
my heroin
Cannot survive without my savior
in this realm of my uncontrolled behavior
feelin so high as I take her in
she's my heroine
my heroin
Runnin through my veins
flowing to my heart
now I feel her all
Heroin
Heroine
rpt 1 verse
chorus
