Is spending time alone avoidance or strategic disengagement? I suppose it depends on the intent behind it. I tend to think there is a distinct difference between avoiding situations, wallowing in self-pity, and allowing negative self-talk to subsist inside of you, among many other things, all while disengaging from family and friends; and consciously, strategically disengaging by going into nature to connect with yourself, find balance, and bask in beauty you aren't deriving from any other activity in your life currently.
The positive intention of strategic disengagement is very different to me than the negative intention of escaping through avoidance and disassociation.
I have lived both scenarios and can feel when one or the other is taking over. I can feel in my gut when I am making a choice based on the positive or the negative approach; Both still exist for me given my PTSD, but I make it a point to regularly and strategically disengage through meditation, energy work, and time in nature to maintain my daily balance.
When I take the time to strategically disengage it impacts my perception of everything else going on in my life because I've activated the part of my brain that lets me know I'm safe, I'm clear, and I can think rationally. It is much easier for me to navigate the day to day, taking that time to be on my own.
Now cultivating that time is something that needs to be made a priority, not a last minute escape from reality. When something becomes a part of your personal "culture" and way of living, it becomes a tool, not an escape. Encouraging escapism and disassociation from our lives is part of the struggle with PTSD and it's not healthy. It is part of our reality as people suffering from PTSD, but it does not have to be our way of life. There is much more available to us than we can ever see through the lense of PTSD.
Pay attention to how you are feeling in your gut when you find yourself trying to escape your PTSD. Is it a moment of fight or flight? Or is it strategic disengagement meant to self-soothe, balance, and reintegrate with yourself?