I can't keep relationships or socialize, what does this mean for my life?

I am 17 years old and although I suffer from a list of anxiety disorders including social phobia, I have many other social issues on top of that that I fear will affect my future in a very bad way.

I will try to make this as short as I can while explaining everything as well.

I cannot keep relationships. I only have one friend I talk to (Which is unusual) and even that is overwhelming to me. I go through friends and relationships very fast. And although I have a very deep sense of empathy and understanding for every living thing around me, when I let these people go, I do not feel a loss, I feel relief. I can't have friends, it makes me sad.

For some odd reason I can't handle seeing other people. On Facebook even, seeing people's regular daily lives is very depressing and troublesome to me. It is all a let down for me considering I'm usually off in my paracosm which consists of lively wondersome people and reality never fails to disappoint.

I hate it when people try to be my friend. I HATE when they try to relate to me, it drives me nuts. I feel like when I'm talking to people I'm just humoring them by pretending to care. They're not interesting, they try to relate but they just don't and the process is boring. I never have interesting or fulfilling conversations with anyone, I find everyone very boring even though I care about them as people and I will be nice.

To be honest, the only time I can be happy is when I'm alone in my home by myself. People stress me