Often times, the death of old friendships is framed through the lens of failure. It may actually be a sign of your growth and recognition of old relationships holding you back. Not all friendships are supposed to last a lifetime.

The thing about old friends is not that they love you, but that they know you. They remember that disastrous New Year's Eve when you mixed White Russians and champagne, and how you wore that red maternity dress until everyone was sick of seeing the blaze of it in the office, and the uncomfortable couch in your first apartment and the smoky stove in your beach rental. They look at you and don't really think you look older because they've grown old along with you, and, like the faded paint in a beloved room, they're used to the look. And then one of them is gone, and you've lost a chunk of yourself. The stories of the terrorist attacks of 2001, the tsunami, the Japanese earthquake always used numbers, the deaths of thousands a measure of how great the disaster. Catastrophe is numerical. Loss is singular, one beloved at a time.

Friends are not primarily absorbed in each other. It is when we are doing things together that friendship springs up – painting, sailing ships, praying, philosophizing, fighting shoulder to shoulder. Friends look in the same direction. Lovers look at each other — that is, in opposite directions. To transfer bodily all that belongs to one relationship into the other is blundering.

That is the saddest part when you lose someone you love - that person keeps changing. And later you wonder, Is this the same person I lost? Maybe you lost more maybe less, then thousand different things that come from your memory or imagination - and you do not know which is which, which was true, which is false.

Like all good friends, they hated seeing their relationship lose its emotional innocence, its chastity of good will, and now that the thing was lost, now that searing statements had changed hands and left scars, neither looked forward to the future.

I cannot help feeling there is something essentially wrong about love. Friends may quarrel or drift apart, close relations too, but there is not this pang, this pathos, this fatality which clings to love. Friendship never has that doomed look. Why, what is the matter? I have not stopped loving you, but because I cannot go on kissing your dim dear face, we must part, we must part.

it is a sad truth in life that when someone has lost a loved one, friends sometimes avoid the person, just when the presence of friends is most needed.

To forget a friend is sad. Not everyone has had a friend.

Lost love is still love, Eddie. It takes a different form, that’s all. You can’t see their smile or bring them food or tousle their hair or move them around a dance floor. But when those senses weaken, another heightens. Memory. Memory becomes your partner. You nurture it. You hold it. You dance with it. “Life has to end,” she said. “Love doesn’t.

To forget a friend is sad.

Your best friends should bring out the best in you. If they don't, lose them; they are no friends.

Those who cannot conceive Friendship as a substantive love but only as a disguise or elaboration of Eros betray the fact that they have never had a Friend. The rest of us know that though we can have erotic love and friendship for the same person yet in some ways nothing is less like a Friendship than a love-affair. Lovers are always talking to one another about their love; Friends hardly ever about their Friendship. Lovers are normally face to face, absorbed in each other; Friends, side by side, absorbed in some common interest. Above all, Eros (while it lasts) is necessarily between two only. But two, far from being the necessary number for Friendship, is not even the best. And the reason for this is important.
... In each of my friends there is something that only some other friend can fully bring out. By myself I am not large enough to call the whole man into activity; I want other lights than my own to show all his facets... Hence true Friendship is the least jealous of loves. Two friends delight to be joined by a third, and three by a fourth, if only the newcomer is qualified to become a real friend. They can then say, as the blessed souls say in Dante, 'Here comes one who will augment our loves.' For in this love 'to divide is not to take away.

...friends were more important than lovers - not least for the fact that friendships generally lasted longer than relationships.

Better to have loved and lost than never to have loved at all.