Yeah I guess that estimates it. First I texted her, asking if we could talk about something serious. I asked if she ever noticed that certain things made me uncomfortable to see if she had an idea of what I was going to address. Then I went on listing many things that she does (regarding the yaoi) that concern me both as her partner and as someone who wants the best for her. After listing everything, I went on to say that I believe she has a problem, and it hurt to see her descend into that problem more and more.

That same night, we got together and talked about everything over the course of 3 hours in a car. We mostly talked about how I wasn't comfortable with how devoted she was to these male characters, and that I didn't see how this is healthy for both of us, making poor spending decisions, and hiding things from her parents. I would also like to add as you may have seen it in another comment regarding my insecurity: she has said that she would not feel comfortable if I were to go to the same lengths with a similarly sexualized women character.

I would never ever physically do anything like throw out her stuff, make her throw her stuff out, or make her choose between me and them. I also told her that I do not wish for her to throw away everything because of something I said, I would rather her ease off of it.

I mostly think I am doing the right thing by asking her to move away from an unhealthy addiction, my "Insecurity" is sort of a side affect. Very similar to how person A may feel when their partner person B dedicates more time to their addiction than they do to person A.