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

She is my first long term gf, she's had 2 previous long term relationships, so I consider her 'more experienced' and I don't really know what the norm is when it comes to costs and paying in relationships. 

She has an average salary job. I am self employed so my salary depends on business and can vary greatly month-to-month. 

When we started dating, I would offer to pay but she insisted on splitting most of the time. once we got serious, she'd often let me pay for dates (usually ones I invited her on, and if she invited me, she would pay). Over time I found myself organising (and therefore paying) for most of the dates. And later paying for shopping (small gifts, but it all adds up).

We were arguing and I brought up the money I have spent on her. I guess I had been harbouring the issue for a while. She took it very badly and didnt seem to understand why it was even an issue to me at all. We haven't spoken of it since. 

To give some idea of how much I spend - maybe 2-3 meals (out or pizza delivery) a month, and hotel room on our anniversar. We were planning a holiday, I don't know if I am expected to pay for that.
<bot>: I don't know whether I should be 'expected' to pay for things for my gf. (It is my first serious relationship)