i recently discovered the power of open communcation about our emotions and feelings. As our feelings and emotions were not allowed to be there as a kid we surpressed them in our body. If we now make new experiences and realise that our feelings are allowed to be there, then we make a new experience. Even if we start with the feeling: "I am feeling like I am not here". If this is being heard by another person, then there is a connection which was not possible in our childhood. The other person needs to allow us a room, then something new can come up in us. Otherwise we are in a constant loop of the same feelings.
Another loop is that we believe to solve this by ourselves, as we learned to do everything by ourselves. At least this is the case for me!
Personally, I believe this guy is amaizing.
For me DP is a result of a severe attachement trauma in our childhood.
Take care and wish you all the best,