LET DOWN!

I have always took people on face value. Always trusted people unless I had reason not too and thought that like myself people had respect for others and there feelings.
Today I was let down in a very big way. Someone who I thought a lot of, who I thought was very special walked away out of my life and will not tell me why.I thought this person was special, had a warm heart and really cared and that person as walked away at a time when I really needed them in a way that as caused me most pain.
It as hurt me more than I have ever been hurt in my life. How do you trust, love, believe in people again. I don`t know.It just makes me feel lost, alone, hurt and angry.
I have always believed that tomorrow will be better than today but at the moment I don`t. At the moment I feel as if I haven`t got a single thing in the world to live for.