Xorkoth
Bluelight Crew
My experience was very similar and this is eerie. Like you I am unsure if they're separate entities or a manifestation of my own mind. Since it has been many years and I've had time to reflect on my DPT breakthrough and have broken through on DMT/done other substances I've figured out that reality can be molded/changed at will. It's kinda like a computer program running all the time that you can hack/modify to screw with the output. The observer of the environment can change the environment in other words. I discovered the ability to do this a few summers ago and have toyed with the idea many times since then while sober and tripping. I'm still unable to answer the question of: Am I the dreamer and reality is just a manifestation of my own mind or are one of you dreaming and I'm just a manifestation of your mind? Or perhaps we're all part of something's dream and connected to each other on levels we can't even understand? Starting to get into odd stuff here I know, sorry.
My experiences have indicated to me that we are the universe's dream. We are all the same consciousness, experiencing itself subjectively in an infinite array of circumstances. So in a very real sense, I am you and you are me. We couldn't possibly be any more connected.

Very interesting thoughts.