What is wrong?

I mean there has to be something fundamentally wrong with me in order to not be able to hold on to a relationship. WHAT IS WRONG WITH ME. I am not clingy I am not stalkerish or possessive. Then why do relationships slip through my fingers. I couldn't even see past the weekend in a relationship. Am I that undesirable. They all want to be my friends. Yeah we all know what that means. "I like you but not that much." so that's it I always get shafted in the "FRIENDS" category. This cant be right I mean, what is wrong with me. I might not be the most beautiful women on earth but there has to be something else desirable about me. The last guy I went out with liked me for 6 months and then a week later shafted me. That's right he outright dumped me . Man do I have it bad. He didn't want to hurt me was his excuse but guess what he did ( yeah I don't need to hit the nail on the head for that one.) and I am not going to blame him either, I was scared .I didn't want to start something and then be hurt, but I gave in eventually and now he wants to say no and ( this is the best part * sarcastic*) he wants to be friends. That's right the good ol' lets be friends routine. Yeah right who are you kidding. You don't want me then I am not going to hang around till you tell me to get the hell out of here. Once again I am not going run with the tail between my legs. I know when I am not needed. I am not as stupid as I come off. I am not dense either. I can take a hint. Its the universal truth guys can never be platonic. But I mean what was I a passing fancy. If I was an itch that you wanted to scratch then why the hell didn't you say so. Why didn't you figure out that you didn't want me earlier?