Considering Breaking Up with Fiancée Due to Lack of Attention

Hi everyone. I need some advice. Once again I'm thinking about breaking things off with my fiancée of 1 and half years. I get this urge at least once a week to break things off. I need to know I'm not crazy and that this isn't just my BPD talking and that I'm going to make the right decision. I'll try to keep this short. She has BPD too. When we first started dating, we were so in love and spent so much time together. She said I love you a few times a day and was very affectionate and craved lots of attention. Fast forward to about a year later on our anniversary, as more time went by she stopped saying I love you for the most part unless I say it first, stopped giving/asking for attention, and is now totally engrossed on her phone and TV when she's awake. I feel totally ignored. I've talked about this issue with her until I'm blue in the face but nothing ever changes. I've made changes for her (she says I interrogate her too much so I've dialed back on asking so many questions but that was because I was genuinely interested and curious and I've tried to pitch in more around the house) but I've asked for more attention and I never get it unless I ask and even then it seems like a total chore to her. My mom and I were talking tonight and I've noticed I pay for 90% of our dates. Another thing that really grinds my gears is she's not very reactive/expressive to the things I do for her but she's been that way since we started dating and she's very blunt/rude. I decorated the house and got her her favorite kind of cake and all kinds of gifts for her birthday but she just mutters a very blank-faced thank you when I do things like this for her. She is rude in the sense that she'll argue a lot with me and isn't very sparing of my feelings despite knowing I'm sensitive. This has been an issue the entire time we've dated but I've looked past it. I just don't think I can handle this anymore. It just makes me devastated though because we were going to get married and we were trying to get pregnant but since the change in her we stopped trying for a baby because we came very close to breaking up a few times. Am I asking too much or is this genuinely reasons to be upset and warrant a break up?