This is the first story I have submitted. I really don't have many experiences that cannot be attributed to coincidence or happenstance, but this one has stuck with me for decades. I was in my 20s, single, living in the Pacific Northwest where I had recently moved with a good friend. My family was far away, on the east coast.
I should mention that I had a very ill older brother, a sensitive soul who suffered from unrelenting depression, had tried to kill himself many times, and did eventually succeed. This incident occurred about five years before he died, during a period when his illness was great.
I was awake in the middle of the night, for no apparent reason. I had not woken suddenly. I realized that my room seemed unusually dark and it seemed as if the darkness was alive and hovering over me. I felt great sadness. Suddenly I became worried that something was wrong. Since my father had a heart condition, I wondered if he had died. But I shook off that idea and immediately thought of my brother. I found myself thinking, "This is what his pain feels like." Then the dark feeling/presence slid away from me, in the direction of my roommate's bedroom. I noted the time. It was 2am.
I would have written it off as a dream were it not for my roommate's reaction when I mentioned it to her. She said, "Was it around 2?" She stated she had not realized anything was there until she found herself thinking, "Oh, it's gone now."
I don't know if it was my brother, but something was there. It was not harmful, just very very sad.