Lyric discussion by circusjuggler 

Cover art for Temperamental lyrics by Everything but the Girl

She is about to break the commitment that she has kept with a complicated guy because of his unsteady temperament, which makes her didn't recognize him sometimes ("what planet are you on?"). He cannot deal with his own behaviour indeed ("you pour your heart on mine. you say it screws you up") and if he still owned some chance for keeping on this relationship with her, this chance is practically over.

"I don't know what you want from me. all this endless sympathy."

Well, I think she intended to be very ironic on these lines above 'cos it doesn't exists definitely any harmony on this relationship...