I see human-shaped shadows from things that aren't there.
When my friend slept over one night, we looked in the mirror in my room at 3 AM from an angle and we both saw a light blue figure kinda floating there...
I can sense the presence of many things (humans and other things included)
More than excessive deja vu moments
I often see one shadow in the exact same shape following me every day, but when I look to see, nothing is there and the shadow disappears.
When my friend was over until midnight once, he was telling me how his grandma watched over him or something. That same night, he tried just talking to nothing and there was a very very faint response of "Thank you..."
I hear things that aren't there
When I was around 6 (I was a total dumbass, btw) we went to get out passports, and then I called the security guard fat; my mom was praying at the time, and somehow, glitter got on my face (I was just standing there, face didn't touch anything) and my mom asked my sister why she put glitter on my face and my sister said she didn't do anything...