My GF has totally changed since I got a new higher paying job, Im considering breaking up with her

I 28M have been dating my girlfriend (29F) for about 2 years. Our leases both end in a few months and for a while we’ve been in agreement we’d move in together after that.

For most of our relationship we made around the same amount of money so we always split things and money was never an issue.

Well last month I got a job that I wasn’t really expecting to get, I thought I wasnt qualified but they loved me in the interview process and gave me an offer.

This basically doubled my salary. While this was exciting for me, she seems to be even more excited about it to the point that it actually feels disrespectful.

Our agreed budget on what we’d spend on an apartment is now all of a sudden not enough for her. She wants to live in a much nicer place and for me to pay the majority of it.

She also keeps suggesting we go to fancy restaurants with the expectation I pay. I was happy to treat her for a nice celebratory dinner when I got the job but she keeps trying to set up more and more reservations.

It makes me feel like she’s treating me like a sugar daddy as much as I feel gross typing that.

I told her I want to stick to our original rent budget and go with the same split we had already agreed to and that I dont plan on changing our lifestyle much and she said Im being greedy.

She is pushing to live in luxury. This just feels irresponsible because who knows what could happen. If I suddenly lost this job I wouldnt expect a comparable one to be right around the corner.

We got in a big argument last night and im considering whether I really want to continue this relationship if we cant go back to the setup we had.

I dont want to go nuclear if I dont have to but would really appreciate some advice on the best way to approach this.