Drifting, as long as you recognise that feeling a failure is not the same as actually being a failure. And that it's part of the process
I found that I also just want some people to act as though nothing had happened, so they treat me as before. A balance in that respect can be good.
Be your own physician. Do what seems right for you at the time. It will change. Be your own best friend and carer, if you know what I mean.
This period in your life, all of our lives, won't last forever. Hold that thought when things are particularly bad.
Having your senior manager go through the same thing is a godsend for you, not for him of course. But he fully understands. I can't say I fully understood the impact until it happened to me. And I'm sure lots of others would be the same.
You are doing well, you are letting it out, you are facing it, you are doing what you can to help yourself, you are seeking advice. And big up for getting back to work.
If you have ever suffered the death of someone close, you will see the parallels. At first you think things will never be the same again, and that you are detached from everyone else. They are going about normal life and you are not part of the world anymore. But gradually you heal and become part of the normal world again.
Can I ask, roughly how old are you? Don't feel you have to answer, no offence will be taken