以下是一些友情相關的英文短句：
1. A friend is a second self.
2. A true friend is known in the hour of need.
3. Friendship is like money, easy come, easy go.
4. Friendship is the greatest thing humanity has given us.
5. A friend in need is a friend indeed.
6. Friendship is a bridge of understanding and sharing.
7. Friendship is like wine, it gets better with age.
8. Without friends, life would be a world without color or fragrance.
9. A good friend is my best possession.
10. Friendship is the sweetest blessing in life.