I would not think of depression that way, I would be kinder to myself and think of it as a defense mechanism; it is helping you to cope! If you think about it, it is quite clever.

The problem with some defenses though is that they can't last forever because things are constantly changing. Castles were great until gunpowder was invented?

I would use your depression defense to help you with your other difficulties; it sounds like you have a pretty good list of what makes you anxious/uncomfortable? Being slowed down by the depression means you won't have to/be able to tackle huge chunks of problems all at once (which is a good thing!) but you should be able to plan smaller ways to gradually work on your anxiety problems. As your anxiety problems lessen, hopefully so will your need for the depression defense and it will lift too.

Do you see a therapist? If not, I would start there, with a single person outside of your family/household. I'd make myself a list of what frightens me, rank order it from least scary to most and see if I could think of ways to work on the "easier" difficulties I have.

With the depression, you are not going to let yourself do too much so you can relax a bit. Nothing "sudden" is going to happen! I remember when I realized I was so well defended, would "shut down" faster than the blink of the other person's eye, that I could try to do some scary things, knowing I was a good defender of myself if it got to be too much for me. Trust yourself, your unconscious! "You" are doing good things for yourself with your depression, not just "bad" ones!