HELP PLEASE!!!

The speaker in Yeats's poem goes into the woods at night because "a fire was in my head." What does it mean that a fire was in the speaker's head?

AHe is confused because the trout becomes a girl.

BHe cannot keep the fire in the house going and needs more wood.

CHe is angry because the girl fled from him.

DHe cannot sleep and needs to get out of the house.