how do you know?

How can you know for sure that something will not happen when it has happened 8 times before? You can't say this time will be different and know for a fact that it will be. Especially in my life......

Here we go again......

Every time one of my really good friends get into a relationship, I'm suddenly no longer part of their life. My best friend just got into a relationship, and I've already noticed that she's slowly been ignoring me. Okay maybe ignoring isn't the right word.... She doesn't have time for me anymore. Everything revolves around him and her job. So her I go again spriling into a round of depression close to tears thinking What is it about me that people don't like spending time with me? and Why can't I have a relationship?
I hate my life