One thing I found in half a lifetime of pulling back inside, you have to keep pulling further back and there's only so far you can go; trust me, being stuck in the inside of your head doesn't feel quite so safe and comfortable.

The more space you make "around you" that is safe (and I'm way out on the plains beyond my castle walls now :-) the more there is to do and the happier you will be and, oddly enough, safer you'll feel.

I would find a good therapist to start "exploring" with.