@Vee this is a valid point however she does have 2 kids, 7 and 11.. and all the women she was here with have children as well
Okay... so probably just an unfortunate case of growing apart over the years with distance? or maybe just not wanting to seem inconsiderate since your little one is 8 months old? You could talk to her about how you feel... maybe just a misunderstanding?
I do think this is an overreaction. I also have a long distance best friend (friends for 25 years & long distance for 10+). I love seeing her in person, when possible. But I would never expect her to change her plans or include me in a trip that I am not a part of just because it happens to be in my city. Personally I think the fact that she had dinner and took an evening of her time away from the trip to see you and spend time with you is more than what should be expected. She's on a trip with a group that you are not apart of.....if you want to really spend time with her then invite her to visit or go visit her when the point of the trip is actually about the two of you. I do agree that she shouldn't have agreed to hang out if that was not feasible for the group though, but she may have felt like she couldn't say no to you without hurting your feelings and figured a text would be easier.
Maybe she realized she didn't want to spend time with a baby? If she and her friends all have kids, and they're on a girl's trip without them, I could see just waiting a total break with no crying/baby time at all... If that's the case, the communication sucks but maybe this would be different a year from now when your baby is bigger.
The harsh reality of being a mom/ parent with friends who don't have kids is you'll most likely drift apart as interests and priorities stop aligning. (Assuming she doesnt since you didn't mention it) While you still feel the same about her and your friendship, she may feel its now too different and now finding other women more alike ie more 'freedom'. No fault of yours, it just seems to be what happens and I'm so sorry. Obviously hoping for your sake that this is one of the very few times its not the case and it was just an innocent oversight on her part.