Paranormal things

Hi. The reason I’m here is that i had a extranormal event in my house. I didn’t hear something but i saw something. I don’t drink and i don’t do drugs. At the beginning my roommate told me his bedroom was too cold, and for some reason i made all the reparations. However he told me that during the night someone touched his leg. I didn’t believe him. Last night when i was in bed for no reason i heard steps and somebody knocked the door of my bedroom.

If someone can help me, I will be open to hear you.