The Dewy Morn by Richard Jefferies

She had seen him so little, and yet her passion had taken such hold of her. She knew that she had not come forth to see the sunrise and to bathe in the light of morning. It was to drink deep of the emotion which filled her; she must go out into the broad morning where alone was room enough for the heart to breathe. Filled and overflowing with love, yet such is the insatiable nature of passion that she, who thought of nothing else, went to try and think still more.

All this had come at once, in a few weeks -- all this concentration and burst of desiring; and with so little cause, for she had scarcely seen him. This proves that her heart had been full of love to its utmost capacity long before they had met; that incident was merely the outlet.