The Poem Means the Poem

What does the poem "Stopping by Woods on a Snowy Evening" by Robert Frost mean if you ask him?

Whose woods these are I think I know,His house is in the village though.He will not see me stopping here,To watch his woods fill up with snow.
My little horse must think it queer,To stop without a farmhouse near,Between the woods and frozen lake,The darkest evening of the year.
He gives his harness bells a shake,To ask if there is some mistake.The only other sound's the sweep,Of easy wind and downy flake.
The woods are lovely, dark and deep,But I have promises to keep,And miles to go before I sleep,And miles to go before I sleep.