LTR of 3 years at her breaking point

Not sure if it makes more sense to post this on askTRP or askMRP.

Early 30's male. I have been in an exclusive monogamous relationship with a 27f for over 3 years. We don't live together, sex is still plentiful and as often as I want, and in general my complaints about her as a girlfriend are minimal. I have been lifting regularly since before we met and have tried my best to always maintain frame and a steady Dread Level of 8, but I am not perfect. We've both been pretty open about the fact that we'd each like to have kids and a nuclear family someday, and I could see her being the mother of my children. One point of contention we've always had is that she wants to get married, whereas I have always maintained that I am against legal marriage.

She's been questioning the future of the relationship recently. She's been saying that I don't ever make her feel pretty but instead when she gains weight, I tell her to lose 5 lbs. She's jealous of the attention/flirting I get from other attractive women (some are her friends) because men don't really flirt with her. Her jealousy is to the point where she fantasizes about those women watching us having sex so she can "show off what she has that they can't have". She also said she's tired of feeling like she always owes me money and that I never say "I love you" except once in a while when we're having sex. When she's (legitimately) sick, sometimes instead of offering to help or comforting her, I ghost her. Et cetera.

To be fair, she has been occasionally bringing these things up for a long time now, and I've mostly ignored it. But she really forced the issue recently and pretty much said that she's at her breaking point because I "haven't been enough of a provider, financially or emotionally". She also said that she definitely wants a marriage with kids. She doesn't want to dump me, but that she also doesn't see the point in continuing the relationship if her needs aren't going to be met. The whole conversation felt very familiar. It was "THE TALK" all over again. Except this time instead of her trying to upgrade her status from friends-with-benefits to girlfriend, she is now setting the stage to upgrade herself from girlfriend to fiancee territory.

Since I'm not the one who has any major problems with the relationship as it is, I told her that she has to compromise with me if she wants to make this work. I said that I am not necessarily opposed to an engagement/wedding (a cheap, formal ceremony/party where we exchange custom, very specifically worded vows in front of our friends/family) right before she gets pregnant with our first kid, but that I am absolutely, non-negotiably against legal marriage. If she wants me to start acting more like a "husband", then she needs to start acting like more of a "wife". I told her that I will take on more of a provider role for her if she takes on more of a provider role for me - specifically, she cooks and cleans more.

She was quite happy to hear all of this, agreed, and seemed very relieved. Of course, talk is cheap. I plan on temporarily kicking up the provision quite a bit off the bat (for every 2 times she cooks me dinner, I take her out 3 times, etc.) and then after a while sliding back down to the 2/3 rule (for every 3 times she cooks me dinner, I take her out 2 times, etc).

One of my main concerns is that I start providing more and eventually it still doesn't end up being enough to satisfy her. The problem is compounded by the fact that she grew up in a wealthy family, so she has a subconscious expectation of a certain standard of living that she's not going to get from me. She knows she's going to have to get over that, because we don't make as much money as her parents and never will. But at the same time, I don't want to waste any more time/money on this relationship if it's never going to be enough provision to satisfy her. But there's really no way to know for sure at this point.

I'm also not sure if this "compromise" will be beneficial for her attraction to me, or if it was just a total loss of frame. Am I over-analyzing this? Any advice is appreciated.