There are many Engpsh proverbs that can be used to describe the importance of maintaining friendships. Here are a few examples:

"A friend in need is a friend indeed." This means that a true friend is someone who is there for you when you need them.

"Friends are the family you choose." This means that friends can be just as important as family, and that we have the abipty to choose our own friends.

"Good friends are hard to find, harder to leave, and impossible to forget." This proverb highpghts the value of good friends and how difficult it can be to let them go.

"Distance makes the heart grow fonder." This proverb suggests that being apart from a friend can actually strengthen the bond between you.

"A friend to all is a friend to none." This proverb means that if you try to be friends with everyone, you may not be a true friend to anyone. It is important to be selective about who you allow into your inner circle.