Friends must part. 天下无不散之筵席。
Friendship the older it grows the stronger it is. 友谊地久天长。
Friendship ---- one soul in two bodies. 友谊是两人一条心。
You can know of the real friendship from three situations: the death,the emergency and the difficulties。从死,急,难三件事情上可见朋友的信义。
Friendship multiplies joys and divides griefs. 友谊可以增添欢乐，可以分担忧愁。
The loss of a friend is like that of a limb; time may heal the anguish of the wound,but the loss cannot be repaired失去朋友就犹如被锯掉手脚，随着时间的推移伤口可能痊愈,然而失去的手脚却复不了原。
Friendship is love with understanding. 友谊是爱加上谅解。
Friends may meet, but mountains never greet. 朋友可相逢，高山永分离。