I Write As a Form of Therapy

I used to keep a diary as a kid, but I stopped writing in it shortly after someone found it. I started a new diary in 2013 when I started college. This time, I have kept it on loose-leaf pages in a folder. It doesn't physically look like a diary, so I've felt that this is safer. Since then, most of those pages have been transferred into binders so they won't become torn with time. I actually need to buy another new binder and page protectors since my folder is starting to reach its capacity again. School's over now, and I've noticed that my entries over the past month have been longer and more frequent. I'm writing more about the inner-workings of my head, my trains of thought. I never seem to interpret things the way that people around me do, and I suppose this is true about everyone to a certain extent, but it seems to always happen for me.
This year, I also started another diary, but this new one is for my friend. Sometimes, I struggle to find the words when I'm trying to talk to him during one of my anxiety attacks, so instead, once I'm calm again, I type up what was going through my head around the time of the anxiety, and I send that to him.
I also think that keeping these diaries has helped me with writing fiction. By understanding how my own mind functions, I can have a better idea of how my characters see their world. I have a better understanding of how they act and can portray that in my writing.