Abu Hatim gave this advice:

“The wise person, whom Allaah has granted the companionship of another Muslim whose friendship is sincere, should hold onto that friend. He should keep relations with this friend even if he severed them, go to him if he went away, give him even if he did not give, draw close to him if he withdrew far away, and in short, act as if he was one of his friend’s pillars.”

[Raudhat Al-Uqala, Page 103].