quick back ground: I have 3 sisters. Two older sisters(A. & M.) that have the same mom and dad and we share the same Dad. One younger sister(H.) that has no relation to my older sisters, but she and I share the same Mom.
Because of my crazy family tree, I don't often get to have my sisters all together. I am close to both A & M and am close with H, but the three of them do not talk or interact without me being involved, not because of any issues, but just because they have no relation and were not raised together.
All 3 sisters are bridesmaids.
Now the issue: I've scheduled and gone on 2 wedding dress shopping trips. The first one my A & M could not make it and told me well in advice. H texted me the morning of to tell me she had stayed out too late at a concert and slept passed her alarm and wouldn't be able to show up. I wasn't upset or mad by this because H isn't usually flaky and this seemed like a random one off.
The second trip was more last minute (my mom planned it because she was excited to see more dresses after the first trip and really wanted my H there) A & M couldn't make it because it was just a few days notice and it was for the day after Christmas and they had plans. Totally understandable. H did show up to this trip and it was great having her there, she gets along really well with my MOH and my FMIL, we all had a great time. After that dress appointment we all went to lunch and I asked everyone when a good Saturday would be to go on another dress trip because I would really like to have one trip where we all went together and had lunch together after. Everyone, including H, said that 02/06 was the best Saturday, it was over a month away and I made appointments for that day.
Monday morning, I texted H to ask if she would be driving to my house with my Mom so we could drive to the store together or if she wanted to meet me at the dress store. She replied Tuesday morning and said "I have to be at a concert with my boyfriend at 12 that day so I won't be going."
She didn't even say sorry or anything. I haven't said anything back yet, because my feelings are really hurt, which makes me feel like I'm being selfish, but she did agree to this date over a month ago.
I don't know if I should tell her that it is really important to me? or do I just let it go? I don't want to be a bridezilla, but it is really difficult to get all 3 sisters together and I really wanted all of us to be able to do one shopping trip together. I'm pretty sure this is going to be my last shopping trip because I'm about 99% sure I've found THE dress.
Also, I really want to include H when it comes to things with A & M and my MOH because A & M both know my MOH a little more and I don't want H to ever feel left out.
BTW, this is so far the only wedding related thing we've all done together.
Sorry that was so long.