Does my spirit actually leave my body during astral projection?

like ive tried to do astral projection yesterday, and i was feeling my spirit starting to leave my body, but whenever this occured, id be like :"wow, im leaving my body," and i would then become aware of who "i " was and thus i re-developed ego (sense of self). also ,i didnt fully achieve it, but will my body have actually left my body if i did? and if so, would other people be able to see me outside of my body and know that i was astral projecting?