AIO by telling my partner to not make false promises?

I, 23M, and my partner, a 21F, have been navigating a long-distance relationship for a year now. We manage to see each other once or twice a month, and although we had some misunderstandings early on, we resolved them in a friendly manner.

Today, after her classes, she told me she would call within 30 minutes once she got home. I was really looking forward to it since we hadn’t had much communication in the last 12 hours apart from a quick chat earlier. I returned to my studies, keeping my phone close by, eagerly anticipating her call.

However, after 45 minutes without any word, I figured she might be busy and continued with my studying. But when two hours went by with no updates, I started to feel concerned and decided to call her to check in. To my surprise, she was hanging out with a friend she sees every day. While I’m completely fine with her spending time with friends, I do wish she would let me know if she couldn’t make our planned call.

During our conversation, she asked, “When can we talk?” I was a bit taken aback as I had called for the same thing and replied, “Tonight at 9.” I later sent her a text asking if she could give me a heads-up if her plans changed, as a quick message wouldn’t be too much to ask.

For some context, the night before, I wasn’t feeling well and went to bed early. She called me in the middle of the night, going through an emotional moment. I stayed on the line for over two hours, comforting her until she fell asleep, and only then did I manage to get some rest myself. I genuinely don’t mind being there for her—she’s my partner, and I genuinely love her!

We’re both dealing with our own issues and trying to understand each other better each passing day. Still, I can’t help but wonder if I’m overreacting in this situation.