If friends disappoint you over and over, that's in large part your own fault. Once someone has shown a tendency to be self-centered, you need to recognize that and take care of yourself; people aren't going to change simply because you want them to.
As long as you are lucky, you will have many friends; if cloudy times appear, you will be alone. -Donec eris felix, multos numerabis amicos; tempora si fuerint nubila, solus eris
When someone asked Abraham Lincoln, after he was elected president, what he was going to do about his enemies, he replied, "I am going to destroy them. I am going to make them my friends."
I wish that friendship should have feet, as well as eyes and eloquence. It must plant itself on the ground, before it vaults overthe moon. I wish it to be a little of a citizen, before it is quite a cherub.
Consider what you have in the smallest well-chosen library-a company of the wisest and wittiest men which can be plucked out of all civilized countries in a thousand years. The men themselves were then hidden and inaccessible. They were solitary, impatient of interruption, and fenced by etiquette. But now they are immortal, and the thought they did not reveal, even to their bosom friends, is here written out in transparent words of light to us, who are strangers of another age.
Let me tell you I am better acquainted with you for a long absence, as men are with themselves for a long affliction: absence does but hold off a friend, to make one see him the truer.
Genuine human friendship is on the basis of human affection, irrespective of your position. Therefore, the more you show concern about the welfare and rights of others, the more you are a genuine friend. The more you remain open and sincere, then ultimately more benefits will come to you. If you forget or do not bother about others, then eventually you will lose your own benefit.
Almost every man we meet requires some civility; requires to be humored; - he has some fame, some talent, some whim of religion or philanthropy in his head that is not to be questioned, and which spoils all conversation with him. But a friend is a sane man who exercises not my ingenuity, but me.