how do you get over any form of rejection

this has happened to me many times in the past, i try to get to know somebody online, always a girl, i'm honest and speak from the heart and i don't hear from the girl again, then i wonder what i did wrong? did i give off an air of desperation?


i do live alone, get lonely, live with a personality disorder so wonder if i gave off desperation signals and that put the girl off getting to know me? this happened recently on facebook with a woman i liked on my facebook friends.....her last message was a disinterested one sentence reply...and i felt rejected.


i'm a male aged 43 now, and rejection, how do you get over it? i always get devastated by it as i have never managed to find any relationships yet in life.