So we both agreed ahead of time that we would hang out on Thursday night and play games like we do every now and then. The day before I asked to confirm if she’d be available because I knew finals were coming up. She proceeds to say yeah she should be available to hang out tomorrow night. She said this at 4pm the Wednesday before we had plans to spend time together. I proceed to put time aside that entire night messaging her maybe 2 times to see if there was a specific time she would be available and to confirm that she was still available just in case. Just for me to sit around all night waiting with no answer. Then the next day comes and I’m upset so I tell her that I’d like to talk about how she basically stood me up the night before. In which she finally let me know she was overwhelmed with doing school stuff the day after we set time aside after confirming twice (the initial agreement we made that weekend and the day before) that we would be able to hang out. Now she’s saying I’m guilt tripping her into feeling bad for what she did because she explained her situation after the fact instead of before. Which makes me feel bad for being angry at all but apart of me feels like she’s downplaying what she did and is basically saying that what she did wasn’t a bad thing even though it kind of is since I set aside an entire night of my life to spend time with her. So AITAH for being upset or am I valid for being upset?

My sister says that I should stop being friends with my friend based on the messages she read to get better context of the situation but a part of me wants to give her a chance and wait for a time when she’s less stressed and overwhelmed to discuss this issue and see if she’ll at least try to understand my point of view so I’m giving her some space for the mean time. So AITAH?