Sounds like he is trapped by a love that he would do anything for.

Cobain explained that that chorus "Hey/Wait/Ive got a new complaint" was him showing how the media percieved him.

In an interview Cobain revealed that the track was inspired by documentaries about children with cancer. "Anytime I think about it, it makes me sadder than anything I can think of" [Cobain] http://amzn.to/dl5PR8

The title of the song comes from a heart-shaped box Courtney Love gave to Kurt Cobain. Though cobain initially had named the track "Heart Shaped Coffin" http://amzn.to/asVYst