Relationship Problems....help me :(

Every relationship I get into is a living nightmare. Every guy is sweet in the beginning , but before you know it you're used up & thrown to the curb w/ the trash. So many times I've been hurt, lied to, abused, cheated on, used for sex and taken advantage of. Why me??? When I get happy in a relationship, it only lasts for a short time before I'm battling w/ my emotions once again. Once I get even a SMALL indication that he's treating me differently or that he might be lying to me, that's when I begin to feel overwhelmed & trapped in my emotions. So I pick a fight to see how far he'll take it... If he gets too disrespectful then that gives me an excuse to kick him to the curb & relieve my suffocation of insecurities... What if I'm not good enough? What does he REALLY think about me ? What if he's just trying to get a piece of ass?? What if he has other girls??? How do i know if hes telling me the truth??

So many thoughts run thru my head, making all my feelings of depression & anxiety worse. I long for the wonderful attention & feelings of love, but I always get scared & run away- even when im being loved??? What do I do in this situation ??? Anyone comment