Bridesmaid with a... minus one?

So my best friend of almost 10 years is getting married in a couple of months and her bachelorette party was last month. She had 2 as not all of the 6 bridesmaids could attend on certain days. So the first one on the Friday, I attended with 2 other bridesmaids and I was unable to attend the following Saturday, where only 3 could attend. It was an out of town bachelorette for the Saturday and I was fine with that when planning had commenced as I had assumed there would be a decent budget, but as the date grew closer, the price for the weekend away was adding up and getting to be really expensive. I have 3 weddings to attend this summer and other plans so I didn't want to go broke from this one weekend away. So as I attended one party already and didn't feel comfortable spending that much on the weekend away, I told my friend/the bride that I was sorry but due to the cost I would not be able to make it. She seemed to be ok with my decision, but obviously I knew she would be upset, as anyone would be. She recently just sent out her wedding invitations. She did the invitations via email through an online wedding site which you can RSVP right away online. So I got my invitation, set it aside for the weekend and about 4 or 5 days later, went through the steps to RSVP and there were a few spaces to fill out (complete mailing address, rsvp number for adult and children, which days of the event/weekend youll be attending, etc). So I filled it all out and filled out my RSVP for 2 adults, myself and my boyfriend. Now my boyfriend and I have been together for about 8 months and are in a serious relationship, but due to life getting busy, work schedules not aligning, an active summer, etc. My friend and my boyfriend have not actually met yet. Which I never really saw as an issue, but only AFTER I sent my RSVP back saying 2 guests, did she text me and say umm your rsvp is 2? There was no mention of anything when I saw her or talked with her before this time, I just assumed because she knows that he and I are together and its a wedding that I would bring my date. She then went on to tell me how she does not like my boyfriend and I am welcome to her wedding, but he is not. She told me she already has more than the expected number of people who are going to be attending and that maybe one day they will meet, but her wedding is not that day and if she needs to cut out numbers it would be someone she has not met. So i responded to her as it was upsetting some of the things she said, and yes I do understand that it is her wedding, its her decision, but her wedding is a full weekend event, about 45 minutes to an hour away from where I live, she knows I am in a relationship, I am in her wedding, and we have been friends for a decade. So I now feel like I am in an extremely awkward position, because I feel like she is mad at me for the bachelorette, because since then we haven't really chatted all that much. So basically Im wondering if thats something thats common, or if thats her being rude the way she went about it, or its me over thinking it and I should be ok with it? I am not really sure what to say to her right now because I dont want to upset her, as it is her wedding