please help, quite down about this..advice?

In relationships I think i'm cursed but then I think I can't be because that's crazy :S!!!

I had bad 5 brief sorta relationships...even though they wasn't loong I felt rejected!!! and i think this is why I feel i'm cursed and ever since then when I get in relationships i think they'll go off me not love me, reject me etc.

Am I a schizophrenic if i think this???? that i'm cursed in relationships?? get real anxious over it and my mind races :(

when i'm single i'm fine and don't think about it can rationalize it!!!

how to i change this negative core belief?? it's so hard!!!

Am I crazy for thinking this, When i think about relationship CURSE i feel dammed, it sounds scary lol...like whatever happens i'm dammede in relationships!!!

I want to change i've never been confident and i'm afraid if im happy **** will go wrong, can you guys read this and help me with feednback!!!

what does this sound like...Does it seem realistic to me because i'm focusing on it too much???

I was diagnosed with severe anxiety last year...so the year hasn't been great, I come across confident to people, get compliments but my mind is so negative and thinks about me getting hurt all day long I try not to focus on it and change but it's so hard..... help :)