I have actuall in my younger years (28 to 35) had OBE (which could be just dreams as i am heavilly into Sci-Fi) and seen planetary civilisations throughout our universe, without being able to interact with them.

This is why i know they are others out there, AND they are mostly humanoid like, although they are alco energy beings without any humanoid shape or form, although they (some) do change into physical form (many different ones) at will.