When my son was a baby he would stare into the corner of his room for hours, I always thought he had a staring problem. But as he got older he started talking about his 'Friend' who lived in his room. He was an only child so I shook it off as a kid thing.
One night when he was 6 years old, he started crying in the night and I was going to his room when he stopped crying so I went back to bed. 30 minutes later he started again and stopped so I went to sleep. Again he started crying but he didn't stop this time so I got out of bed and went to his room. As I opened the door I saw a little boy about 8 standing by his bed going "Shh... Go to sleep".
When the boy saw me he disappeared. I didn't know what it was but it sure as hell scared me. I searched up the history of the house and it turns out a little boy died in the house due to leukaemia. I think he is a friendly spirit but I left that house as fast as I could.