I Think My House Is Haunted?

My house is a victorian house, With high ceilings and I've lived in it all my life and ever since I can remember, I always felt like I was being watched. When I was younger I always slept in my mums bedroom because that was the only room I felt safe, When she would ask me to go wake up my sisters on the third floor, I would always feel like something was watching me. When I entered secondary school and three of my sisters and brothers moved out, I was put in my sisters old room, On the third floor. Whenever I go up to the room to sleep, I run up the stairs, Skipping steps to go quicker and in the room it feels like something is in the corner by the door. Recently when I walk past the bedroom next to mine the door handle is always pressed down, I lift it up again then the next morning it is pressed down again and nobody goes into the room since my brother moved out. At night when I'm in my room I hear footsteps in the attic then they stop and the feeling of being watched returns along with coldness. My drawing book was next to my bed once and that night when I went to get it, It wasn't there. It appeared the next day on the table next to my bed where I would have seen it the day before and there were tears in some of the pages. Whenever I go into the kitchen, The light starts to flicker but then my mum comes in and it stops. When I was 3, I woke up from my sleep and looked out into the dark hallway from my mums room and then something shadowy moved by the door, towards my bed, I screamed and my mum woke up and the shadow disappeared. Also when I try to go to sleep in my room, If I turn towards the walls, I get images in my head of Old women killing little children and Shadows with demonic faces. None of these things happen when I go to my Dads on weekends and I only feel like I'm being watched sometimes there. Also whenever I leave my school blazer on the kitchen table over the weekend, My things always appear sprawled out on the table on monday morning, My mum and other brother always say they never touched it, every time I ask if they did.