<human>: Can you condense the text into three sentences or less?

I have been with my SO for about a year now. 
She is currently a student in a small town about 60km from where I live.

For the last abut 2 months she has been living with me (semester holidays), and I have to pay for almost everything. 
Food, entertainment, going out - occasionally I find a new pack of milk in the fridge, of which she expects me to appreciative beyond belief. 

My birthday is coming up in 2 days, I did not really plan anything like a party, since it is on a workday, and I would have rather held a party during the WE, but she already invited a whole bunch of people (without telling me) and made me buy loads of food, which I now also had to help prepare, while she turned the kitchen into a mess (she does this every time, and then just leaves everything where it is, until I either get angry or clean it up myself).

She says she is doing all of it for me, and I should appreciate all her efforts, but really, it feels like buying my own presents, and having her wrap them and afterwards thanking her for all her creativity. 

Whenever I bring up the topic of money, she throws a fit and the argument is never resolved. 

I could need some helpful advise on how to tackle this situation.
<bot>: My girlfriend takes it for granted that I pay for everything. She wants to throw me a party for my birthday, but I have to pay for everything. It feels absurd.