Lyric discussion by machinenvy 

Cover art for Hush lyrics by Deep Purple

It's rather creepy, actually. I feel that it's about a guy who is obsessed with the girl that broke up with him. She has moved on, and he hasn't.

"She broke my heart but I love her just the same now"

He's completely obsessed with her.

"...I'm in so deep That I can't eat and I can't sleep"

And he's haunted by thoughts of her, even though she's not around.

"Thought I heard her calling my name now"

He has been nearly driven mad by this obsession, perhaps even to the extent that he will "get her back", whether she's a willing participant or not.

"I need her loving and I'm not to blame now."

I wouldn't be too surprised if this song inspired "Tyler" by the Toadies -- another great, but creepy, obsession song.