What kind of poems are there to describe the sadness caused by the departure of bosom friends?

Jun Jun will be drunk today, and it's a long way to remember. -[Don] Jia Zhi

If you want to know the future and think about the present, it is an inch of heart that the Han River flows eastward. -[Don] Qian Qi

Candle fire has a heart, and the body cries until dawn-[Tang] Du Mu

Sincerely advise friends to drink a glass of wine, and it is difficult to meet their loved ones when they go out to Yang Guan in the west.

A scholar dies for a confidant, and his heart yearns for beauty.