Tell me a short sentence about someone who is extremely cold-hearted. A heart-chilling sentence.

1. Nostalgia is not a good habit, and unstable standards can lead to entanglement.

2. Gradually, everyone will understand that not being able to be with the person you like is actually the normal state of life.

3. The saddest thing is not hiding under the quilt and crying in the middle of the night, but the feeling of loss when I wake up after dreaming that two people have reconciled.

4. I can't spend my whole life, but it's possible for you.

5. He understands all your hints and all your subtexts, but even if you are indifferent, it is not a battle of wits. He just doesn't like you.

6. I am most afraid that my current attitude of not turning back will be a joke in the end.

7. Sometimes, when you are disappointed to a certain extent, a flower will bloom. It doesn’t matter what the name of that flower is.

8. The vinegar that cannot be eaten is the most sour, and the one who is tempted first is the most miserable.

9. Let’s not mention the past. The night is still very long, and so is the rest of our lives. We need to save some energy to wait again, and wait for the people who come after us.

10. In fact, the stars don’t like the moon. Yes, it's just that the sun sends them to accompany the lonely moon.