Hi there
I completely understand why that would make you feel left out and what to withdraw from your friendship.
I think it is very much an age thing, and the exact situation that you have described is a classic one that happens to many people.
Often, the friend simply wants to experience things without their best friend being there. So that maybe they can make new friends independently. It could be anything, but most of the time, the friend doesn't want to lose you but rather have some space. She might have been testing the waters to see how you would react to her telling you these stories. I think it is expected that you would feel upset about it, so don't feel like you have reacted in the 'wrong' way.
If I were you, I would reach out and maybe do something casual together. Sometimes, as people grow up, they want a bit more space in their friendships compared to when they were younger. For example, some people realise they don't want to talk to their friends every single day on Snapchat and keep up their streak, so they start to break things up a little, which some may take as a sign that they don't want to be your friend anymore but that isn't always necessarily true.
It is entirely natural to grow apart slightly, but it's up to you both to figure out how that will work for you now.
This is just simply my view, I would always encourage people to talk it out so you can get back to 'normal' even if that is a new normal.
Anastasia,
BCU Student Rep.