leave someone alone—
1. go away from a person:
- Her parents had gone on holiday for a week, and left us alone in their big house.
2. (also: let someone alone) abstain from disturbing or interfering with a person:
- She yelled at me to go away and leave her alone. But I ignored her and walked up to her anyway.
leave someone to oneself— = leave someone alone 2:
- With his heart sick and sore, he had resolved to go away and leave her to herself, as he imagined she wished to be.