Losing myself...

Is it just me or does it feel like no matter how hard your try or how good you are to a person it just cant and wont get better. Like your just a disappointment and every relationship is a failure? Like you have never had a good man and if one came your way you wouldnt even know it cause thats how messed up you are? I feel lost, angry, helpless, tired, and on the edge of a total melt down... Am i the only one going through this?? If not how do i cope and get through all of it?