Expend For A Friend
The Sages say that having a friend is so important that one should be willing to pay for it! (Talmud - Avot 1:6)
Paying a price does not necessarily refer to financial payments. We might need to spend time and energy to keep a friend. We may have to tolerate some of his negative habits. Or at times he might quarrel with us. Nevertheless, the price we pay for a close friend is a worthwhile investment.