<human>: Me [21 M] with my Gf [20 F] of three years, coexistence gone wrong.

Hello, thanks in advance for reading this.

My girlfriend and I have been together for 3 years now, and we moved to an apartment in town a couple of days ago , due to economical reasons ,and it turned out to be really problematic. Trying to summarize the situation, we come from different backgrounds, I have been living by my own since I turned 18, and I'm half time a teacher, half time pursuing my career as a musiscian. As you can imagine I don't have much time aviable. On the other hand it's the first time my gf parts ways from his parents . She has helped me setting up the apartment but basically she has zero life skills. Anyways, that's not the main problem, because I guess we all learned it the hard way. What botheres me is her 'high schooler' attitude. She just studies a couple of hours a week and doesn't cook because she assumes eventually I will do it, doesn't wash the dishes, even if she eats a candy she will just throw the wrapper on the floor.I have tried to tell her to clean after herself, but somehow, the discussion always end up on me not being appreciative on her efforts, and always figghts fire with fire, saying I would leave the lights on , etc. I find it really difficult to communicate with her, and don't feel supported at all.

What should I do?.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Problems sharing space with my girlfriend because she won't clean her own mess, and is reluctant to help me with the chores.