Hey Frankie11,
This is not that uncommon, I go through this when I shut down, it's a form of depersonalizing myself and those around. I disconnect from life. It's can be a coping mechanism, avoidance, or even a protection method, and yes, you can overcome it. I see that you are a new member here. Welcome :)
There is a lot of information about PTSD and the symptoms that is offered right here on this forum. I would suggest you read up on it and get familiar with what you may be dealing with. Have you been Diagnosed with PTSD, are see a Trauma Therapist? These are things that might be helpful to you.
Take good care of yourself,
peace,
Rain