You choose to keep prioritizing someone who makes you feel like crap. This is really an exercise in self care, to consider yourself and takes several steps back. I do think your reaction to her having plans a little later was a little much. It was her birthday, and she’s cramming it all in. She was rude. But you have a self esteem issue. You hold a lot of weight with how she treats you and have expected her to be nicer, (why?) after she’s hurt you so many times. That’s something you need to consider. Why have you tried so so hard to stay close and change someone who is mean to you? And who isn’t going to change? People don’t change unless they want to and work towards it. She doesn’t recognize an issue. She’s not going to be the friend you imagined her to be. Is there still space for her in your life, maybe at an arms length? Think about it, and seriously consider therapy for this self esteem stuff. You don’t want to pass this on to your daughter.