Scared of people but scared of being alone

How do you deal with being incredibly anxious around people, being too scared to trust any one around you to let anyone in and at the same time the thought of being alone fills you up with dred?

Being in a room full of people feels like torture and I would rather bash my head against a wall.

Yet there are times when I'm home alone that I realise that I'm also terrified of being lonely, having no one to talk to, no one to lean on...

The few people I do trust enough to have let in I'm sure are sick of me by now and because of my anxiety I'm starting to think they don't like me any more which is also scary.

Having anxiety sucks big time