Hi Aemulus2058, know that you're not alone in that.
Whenever an episode occurs to me, I'll find myself doing much the same - not answering texts or calls unless it's people I simply cannot avoid, e.g. my parents or closest relatives. I'll tell myself it's for their good, and a part of me truly believes it to be a form of damage control - it spares my friends the trouble of seeing me like that.
Be gentle on yourself. One day you'll find some better way to cope - right now, you're doing the best you can. Try not to feel too guilty about leaving your loved ones without a reply - they know what you're going through, they'll understand. When you eventually break your way out of the dark room our mind can become, don't let shame for "what you didn't do" get in your way... Reach out to the ones you love. They'll be waiting for you with open arms, eager to hug you again