Would I be being petty to end a friendship over a person not showing up?

Anonymous
So, a friend of mine of 20 years has a birthday a week before mine. She asked me several times to make sure I went to the bar and celebrated with her, even as a single mother, requested me to take the day off work the next day if need be. I went. Even dressed up like she asked. Today is my birthday but my kids and sister celebrated today at my place. I text her hours ago at 6pm and told her to come have a drink with me at home. She said she would. She never showed up but is now on Facebook posting at the club drinking with other friends. My feelings are hurt and I’m seriously thinking about just ignoring her calls from now on.
Would I be being petty to end a friendship over a person not showing up?
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