珍惜友誼的英文名言有：
1. A friend is a gift that can never be returned. 朋友是無法回報的禮物。
2. A life without a friend is a life without a sun. 沒有朋友的生活就像沒有太陽的日子。
3. A true friend is one who walks in when the rest of the world walks out. 真正的朋友是在別人都遠離時，唯一留在你身邊的人。
4. Friendship is like money, it easier to keep than to get. 友情像金錢一樣，越有個性越容易保持。
5. Friendship is love without a name. 友誼是一種沒有名字的感情。
6. True friendship is like health - its value cannot be measured by the rules in the dictionary. 真正的友情就如同健康，它的價值無法用字典中的規則來衡量。
7. The best and most beautiful things in the world cannot be seen or touched, but they can be felt by the kindness of friends. 世界上最好的、最美麗的東西是看不見也摸不到的，它們只能通過心去感受，因為朋友的善良。
以上都是珍惜友誼的經典英文名言，通過這些名言，我們可以更深刻地理解友情的真諦。