Miserable lesbian couple slowly breaking up because Sean, the main character, is emotionally immature, unavailable, cold, and selfish.  Have I mentioned how much I hate reading stories about miserable adults being miserable to each other?  

Add to that Sean's casual racism, lack of empathy, and massive refusal to give a single shit about anything but what she wants?

I hate books with miserable queer protagonists and I don't think it's progress to be all "Oh look how far we've come, queers can be miserable like everyone else".  If that's something you need to find queer people relatable, you're beyond missing the point.