I'm going to try sticking to main experiences, due to the length.
This thing has been happening to me since I was a small child. I used to see things. I played games with people who weren't there (not that I could see them, and it was admittedly frustrating at first when your stuff goes missing, and is placed back in the exact place you lost it several hours later). There was a window in my old house that you could only see from the outside if you looked at it just right. I would have liked to have entered it, but it only held brooms from the look of it, and I couldn't find an inside entrance...
Just before we moved into that house, we went for an inspection. The real estate agent couldn't make it for some reason, but there was a nice old lady who showed me around. She told me that it wouldn't be a proper inspection without anyone to guide us, but she was glad because it meant she could see that her old home went to somebody nice. She explained that the large bloodstain on the wall made her very sad (it was pretty big. Mum almost left the house just because of it). She even told me all about how much she liked cooking in her old kitchen. She looked so happy that I told her she could come back whenever she wanted to cook meals, and that I'd like to try her casserole. She said she would love to, but she didn't think she'd be able to do that. When I asked her why, she told me that it was time for her to move on. I thought she meant move to another house, but when I reminded my parents of this years later, they said that we had been alone, and that I'd been very distracted, wandering around the big new house. I suppose that it explains why I was scolded for opening the cabinets when the lady told me I could take a look. She also told me that I was perfect for the house/the house would like me very much, and that wonderful things happened there.
A year later, when I thought of her for a while, she came back to me in a dream and said she'd been told that she was right about me and the house/the house's inhabitants, and that they wanted to give me a gift. A few days later, I found a pendant on top of the top cabinets (you could only see on top of them by standing on the sink, which I did often). I was curious about it, so I left it for a few days to see if whoever left it would remember to pick it up (I was 5 and convinced that there were fairies in our house. I thought that a few of them might have dropped it, or that they were trying to see if one of us would steal it). Anyway, on the third day, the lady actually appeared in the kitchen for a moment (which shocked me). She said that 'they' had left the pendant there for me, because they thought it suited me well, and that I shouldn't be shy to take it, although they thought it was wonderful that I was so honest (I had said aloud several times, "You left your necklace!" over the past few days). I asked her to stay again, but she said it wasn't possible, so I just said thank you to her and the 'fairies' before she disappeared.
At the time, the pendant had a (I'm assuming fake) ruby center, and all 4 tiny pearls left in it (one fell out the moment I touched it, one was half black, and another was completely black). Unfortunately, over the years the pearls have all been lost. I've also asked my parents about this pendant (at the time, and later) and they have no idea where it came from.
After this, I was mainly focused on finding the entrance to the secret room, which I searched for for years to no avail. I knew where it was, but I also knew that I couldn't reach it properly because it was only half there.
Sadly, we were forced to move houses after 6 years, and we ended up in this house. It always struck me as having a very sad presence, and everything around it was dead. After a few months of living here, I saw a young woman in our lounge room. She appeared very suddenly, and looked at me in a way that told me she was worried about people being in the house. She was blue. Then she disappeared.
Weeks later, I heard someone shuffling around the kitchen, and thought it was my father. I went to ask him something, but all I saw was a pair of legs before they turned behind our fridge and disappeared. I thought my father was pranking me, so I called out several times. My father finally came out of his bedroom and asked me why I woke him up.
Over the years here, many things have happened. I've walked through doorways and back again, only to hear a crunch, look up, and see a mangled spider hanging by a thread of it's web above me. Something has paralyzed me; I've asked for something aloud and it's been taken literally. I think the most memorable experience occurred when I couldn't find my phone. I got out of bed and looked everywhere for it. I finally gave up and said, "I want my damn phone!"
When I went back to my bedroom, my bed had been made perfectly, ad my phone was on top of the pillow.
I don't know if any of this makes sense (I know I'm rambling, but I'm REALLY tired). I used to be really scared of my house, but I know that I have friends, and I like to think that whatever likes creeping me out is just misunderstood, if it is anything. I was wondering if this sounds like a 'something' as opposed to my imagination (which isn't very good, mind).