I'm going to demand my girlfriend fix her apartment.
What made you think that she needs to fix it?
There was a spider in my room. I think it got in through the cracks in the wall.
Fair enough. I understand not wanting to be somewhere that could be a problem.
I think she needs to invest money into fixing up her place.
I think that the nice thing to do would be to help her. It is important to make fixes to things when you notice that they need it.