Faith

So I've been doing a lot of thinking, and I'm come to the conclusion that faith is the hardest task in life to overcome. I've been told all my life to put my whole faith in God and not in worldly things or just one person. Wow, did I mess up big time there. Faith in God overcomes all fears; Faith in god overcomes all obstacles. But what do you do when your faith in people is shaken. Lets just say that faith is basically the same thing as trust; what happens when you've trusted someone for so long, just to be lied to for weeks, months, maybe even years, and then to have them suddenly gone? What if they were basically the one person that you told everything to, that you trusted beyond anyone else? When you've trusted someone for so long, and you feel betrayed....Who do you learn to trust? How do you decide if they are truly what they seem to be, or are just a person that may not mean to betray your trust, but they end up doing the same thing that has happened so many times.