Unengaged friend's BF telling us to move our wedding date because the GF wants it

For context, my fiancé and I have been engaged for 3 years because we could not previously afford to get married as we have to pay for everything. A few months ago, we finally saved up enough money to start wedding planning and got right to it. We started looking at venues and touring them to go ahead and book a venue. Two of our friends (who are boyfriend and girlfriend) asked us how things were going and when our date was, to which we told them the date that we had picked in May, 2026. We had not yet booked anything under this date, but were quite set on it. A few days later, the boyfriend calls my fiancé to say that his girlfriend is angry and sad that our date coincides with the date she had always dreamed of (we had no idea that she ever even wanted that date) and asked us to move it. This made me upset because we were finally started to wedding plan and book things and it seemed like overstepped a boundary, especially because they are not even engaged. I have now been spending time with them with her trying to convince me that a different month would be much better than May, not knowing that I already know how she feels about the date that we had picked out. This feels slightly manipulative to me, but I also get having a dream, I just wish she would be upfront. To avoid drama (especially because they are supposed to be in the bridal party), I did move the date to a different month, but I cannot get over this unsettled and weird feeling.

Now that I moved the date, I catch her counting the weeks between when our weddings would be (keep in mind that she is not engaged) and saying things like "two weeks is enough time between weddings right?", not knowing that I know how upset she was earlier. I can tell that she is planning to be married on that date, whenever she gets engaged (probably at the end of this year). I did tell her that I thought that people could have a wedding whenever they want, but if others were married recently, they might not have the funds or be on a honeymoon during that time, trying to inadvertently say that I might not be there. I know I need to talk to her and have an upfront conversation about this rather than beating around the bush, but I am nervous as the only time I ever confronted her, she screamed at me. She can be very entitled at times and has a hard time being told that she upset someone, so I know she won't take it well and I really want to avoid the drama, especially because her boyfriend and my fiancé are BFFs. So I guess my main question is, am I wrong for being irked by this!?

Edit: I also wanted to add that she was not the sole reason we moved the date, we also wanted it to be a bit closer since we have been waiting for so long and are trying to get the date right when flowers are at peak bloom!