Friendships don't last forever. Long-term friends are solid gold. Like unalloyed gold, they bend and change shape easily. Also like gold, they are beautiful and valuable. Real friends are there for you even when they're not there with you.
People are different people to different people.
Grudges weigh more heavily on you than they could ever hurt the grudgee. We are all inter-dependent on each other. Both a lender and a borrower be. The Minimum Daily Requirement is two hugs. Love is possible, but it needs effort.