Holy crap, I feel like I could have written this entry myself!
So sorry you are feeling so alone and not being able to figure out the reason you're feeling the way you are. Maybe you don't need to know why at the moment, maybe just try and accept the feeling for now. But I hope you can get some sleep tonight....hugs (Random Internet Stranger hug, I know, haha, but I definitely can relate...hopefully you can get this all sorted out!