关于友情的英语名言，综合权威资料整理如下：

一、经典哲理类

1. "A friend is a second self."（朋友是第二个自我）——莎士比亚

2. "The friendship of a gentleman is insipid as water."（君子之交淡如水）——英国谚语

3. "Without confidence there is no friendship."（没有信任，就没有友谊）——法国谚语

二、情感共鸣类

1. "A friend is someone who walks in when the rest of the world walks out."（别人都走开时，伴侣仍与你同在）——道客巴巴

2. "A friend is always there for you, even when you're at your lowest."（朋友总在你最低谷时陪伴左右）

3. "Friendship is not about how long you've known each other, but who has always been there."（友谊不在于相识长短，而在于始终陪伴）——佚名

三、行为准则类

1. "A ready way to lose a friend is to lend him money."（借钱易失友）——英国谚语

2. "A faithful friend is hard to find."（知音难觅）——佚名

3. "A friend in need is a friend indeed."（患难见真情）——佚名

四、哲理比喻类

1. "Friendship is like a garden； the more you nurture it, the richer it grows."（友谊如花园，需用心浇灌）——佚名

2. "Trust is the foundation of friendship, and honesty is its cornerstone."（信任是友谊的根基，诚实是核心）——佚名

3. "The best kind of friendship is one that grows stronger with time."（最珍贵的友谊会随时间愈发深厚）——佚名

这些名言从不同角度诠释了友情的真谛，既有对情感陪伴的珍视，也包含对信任与责任的强调，可作为人际交往中的座右铭。