guy problems…

So I was seeing this guy and had been off and on for the past few years. He would always ask me if I was his girl and I’d say yet, but he wouldn’t call me his girlfriend or consider us together in a relationship. All of a sudden he stopped wanting to hang out and would always make excuses as to why he couldn’t see me. I finally gave up and recently found out that he had found someone else. He just never told me about her. It didn’t really hurt so much that he was seeing someone it’s just that he actually referred to her as his girlfriend. He’s also called other girls in the past his girlfriends because he’d always refer to them as his ex girlfriends. I just don’t get why he wouldn’t ever consider me his girlfriend. It kind of made me mad, but also upset because then it made me wonder what was wrong with me. Why is it that he could consider other women his girlfriend, but not me? He always introduced me to his friends by my name saying I was a friend. I ended up crying the whole night because it hurt that I wasn’t special enough to him I guess for him to consider us in a relationship together. It also brought back memories of how I’ve been hurt in the past and not just by guys, but by people I thought were my friends. I’ve pretty much been screwed over by everyone I’ve ever trusted. I just don’t know what to do anymore because I can’t take getting hurt again and again and again anymore. I almost started cutting again, but didn’t. I know it’s not healthy or good and is stupid, but for some reason it makes me feel better. Or it used to anyways since I haven’t done it in forever and am trying to not do it. I just don’t understand why I keep getting hurt since it’s not like I always go for the same type of person. I’ve had many different types of people who were my "friends" and guys whom I’ve dated. It just really makes me wonder what’s wrong with me.