Believe me, you are not alone in this. Friendships and relationships alike I have lost due to similar behavior.
What has worked for me somewhat is warning people from the get go that I'm not quite right, so they have an idea of what they're getting themselves into.
I notice there's no real gray area when it comes to people liking or disliking me. People either love the hell out of me, or hate my guts with a firy pashon.
and there a few people that will always be in my heart, even though they're gone forever. For me at this time it's a friend or two, but it's been ex's in the past.
*Hugs*