It started shortly after I started openly saying that I thought that the house my parents and I live in is haunted. It's just this eerie feeling I got while we had a temporary bedroom built in our garage, which served as my bedroom throughout high school.
At night, when I was getting ready for bed, there was just one particular corner of the room that seriously creeped me out. When the lights went out, the corner would just stay darker than the rest of the room; it always looked like a black silhouette was standing there. To top things off, each night, another black shadow would walk into my room and stand next to my bed. On nights when I slept with my head pointed towards the door, I'd have trouble sleeping and nightmares, so I learned really quickly to sleep with my head pointed the other way.
Trouble was, this meant that my head was pointed towards the corner, and it really, really bothered me that I couldn't keep an eye on this corner without turning my back on the door.
Eventually, I finally had to tell people. So on two separate occasions, I told my two best friends about "the ghost who stays in the corner." Each of them reacted to it the same, with only minor differences. The more reclusive of the two girls gave it a tut and a chuckle, along with a little "ooo" for spooky effect, and she ended up with a stomach bug before the night was through. The more extroverted openly laughed and poked fun at the ghost and called him (I've always assumed both were male) a peeping tom, and she ended up with a sort of rash of small bumps on various parts of her body, sort of like chickenpox. Both times, the girl in question was better by the next morning. Still, the fact that something happened BOTH times that the ghost or spirit in the corner of the room was mocked seemed more than coincidental.
Not long after the second time it happened, I started talking to the ghost when I was by myself. I never heard anything back or that sort of thing, but somehow thinking that there was someone listening to my rambling made me want to do that very thing. As I kept talking to the ghost (I called him "The Room Ghost" for obvious reasons), I began to notice that, at night, the dark shape in that corner would move at night. Before long, it would move to my bed shortly before the ghost that usually entered my room arrived, and it would move toward the intruder and chase it off.
At first, I was fine with this. I felt safe in my own room for the first time in a long, long while. However, when I went to learn more about the house we live in, I found out that the only residents who had lived in the house before my parents were the woman who sold us the house and her father before that, and he was the one who built the house.
Now I don't know what's tagging along with me all the time, since I don't own anything that once belonged to a deceased relative or anything like that. The entity still acts like a guardian, although in my mind's eye he never comes across as being a purely good or purely evil thing, which I figure means he's not necessarily a demon, as that would be my next guess.
If anyone can shed some light on the matter for me, I'd really appreciate it. Usually I'm super-savvy in this arena, since I seem to have a good standing with the spirit world, but I'm genuinely stumped. He doesn't try to do me harm, and he doesn't act like an incubus or anything like that.