<human>: I'm a student going into debt at an expensive grad school, he (Sebastian let's say) recently started a job where he easily makes 6 figures/year.

I've only dated other male students (including Sebastian when we met) and have been fine with splitting dates and food 50/50.  I was very happy with our relationship at first but things have changed and now I deeply resent him for asking me to pay him back a couple bucks or inviting me to expensiveish events without offering to pay.  It may be unreasonable for me to feel hurt but I can't help it because I see it as a materially inconsequential matter to him.

Since I grew up in a progressive culture and am wary of men paying, I don't know if asking him to pay will help the situation.  Sebastian grew up in an extremely feminist culture himself. That being said, many of my working platonic friends are very generous to me and I don't see it as coercion or asserting dominance or whatever.

So who has tips for weathering the infamous income disparity? I have never had a good salary so I can't imagine myself in Sebastian's situation.  The only solution I see is to stop doing things that cost money together.

Can you summarize the given text in a few sentences?
<bot>: He's rich and won't pay for anything, I'm poor and hurt.  How do I stop the resentment?