This was hard for me to read because I relate so much to the negative self talk and it was a little triggering. I stopped reading after the break up. I guess it got a bit much for me and it was obvious this doesn't have a happy ending. I could be wrong though. I also couldn't really bring myself to care that much about the break up since I didn't know anything about the guy besides that he's a writer and polyamorous.
I liked the art of the girl in her little room. It gives me a bit of a The Sims vibe. It's cute and it's what made me want to play it tbh! And the little creatures(?) representing the negative thoughts were cute as well. I think you also did a great job writing them. The music was nice. I also really liked how the text box was set up on the side. It was interesting. :)
I'm sorry I didn't finish it but I wanted to share my thoughts anyway. I hope that's alright.