There's an important message here it seems, and that is that life is all about risks. There is nothing in life that comes to us without us becoming vulnerable at some stage. I suppose friendship is like that as well. The fact that some friends prove to be false should not let us conclude that having friends is a bad idea. As in all else, we need to learn from our experiences and put them to use in ways that will reduce our risks in the future.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)