be friends with

对...友好，与...交上朋友

be due, be due to, be eager for sth., be eager to, be envious of, be equal to, be essential to, be exposed to, be faced with, be familiar to, be familiar with, be far from, be favourable to, be fed up, be fed up (with ), be fed up with, be filled with, be fit for, be fond of, be free from, be full of, be generous in, be generous with, be glued to, be good at, be good to, be hard of hearing, be hard on sb., be hard pressed to do sth., be hard up, be hard up for money, be harmful to, be ignorant of, be in (good) shape, be in charge of, be in despair, be in drink, be in fashion, be in for, be in honour of sb.(sth.),