I desire so to conduct the affairs of this administration that if at the end... I have lost every other friend on earth, I shall at least have one friend left, and that friend shall be down inside of me.
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.