I'm writing this now, as it's currently happening. My boyfriend and I always hear things rattling around in the attic (wood creaking, footsteps, and things dropping) and I always kind of brushed it off as nothing and didn't really hear it anymore because I was so used to it. Until one day his parents actually addressed me about it saying "Do you ever hear the spirits in the attic?" That's when I realized, all the things I hear in the attic are actually there. And they all knew it.
Today my boyfriend and I went out and bought some board games for a rainy day. Once we got home we decided to go up in the attic and see what games he already had, when we were done we began walking around up there talking about what parts of the attic sound like what we hear downstairs (Figuring out what part of the attic was above his room). He explained to me that sometimes you hear the footsteps and what sounds like a bang into a bookshelf next to the staircase like someone is looking over the railing down the stairs. After we got done exploring, we went on with our night.
Tonight when we came home and got ready for bed we heard the normal footsteps which had ceased for some 6 hours then a loud bang. After he mustered up the courage to go up there he found nothing out of place except some books from the bookshelf! We can't really understand why this happened. Nothing like this ever happens. When we were up there earlier today we said hello and goodnight (that might sound bizarre but if there really is something up there why not greet it?) Maybe it just wanted us to know it was still there. His cat loves the attic, and loves the apartment and they say that cats ward off evil spirits. If anyone has any insight or comments they are welcome!