My friend was 30-40 minutes late for our dinner plans last weekend, but didn’t tell me why until she arrived. I was nice about it. Now she’s flaky?

So I made a dinner reservation for 7:15 at a nice restaurant. My friend told me she’d be a “little late.” There I am, sitting at our table for like 25 minutes and I called her asking what’s wrong. She told me her car was towed and a whole bunch of things went wrong that day. I was really understanding about it and just said “yeah no worries let’s put it behind us.” So the rest of dinner and hanging out seemed to go fine. She wanted to go to this one bar after but I couldn’t drink anymore so we just hung out at my apartment lounge. But anyway I texted her the next day and was like “hey let me know if you need anything. Also let’s go to that bar some other time for sure!” And she just said like “no worries! It was great seeing you last night!” And I asked her last week if she wanted to do something and she just said “hey! I’m out of town so I can’t.”
What’s up with so many people acting like this? Especially other female friends. I have some who are awesome and don’t act this way, but I have no idea whether to excuse this or just take it personally. I keep thinking I must have said or done something wrong but I can’t think of anything.
My friend was 30-40 minutes late for our dinner plans last weekend, but didn’t tell me why until she arrived. I was nice about it. Now she’s flaky?
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