I did something stupid and now my friend dumped me. What should I do?

Anonymous

So I made a silly mistake that cost me a friendship. I told one of my best friends she should come to my birthday and basically made plans with her way in advance. But when it came to the time of my birthday, I forgot I'd made plans with her and went out with other close friends instead. It wasn't done on purpose.

My friend was obviously really hurt by that, because she sent me a text dumping me and throwing away years of friendship. I don't get how she could end the whole friendship over something so stupid as a birthday celebration? It feels really petty to me?

Should I want this friend back? What should I do?

I did something stupid and now my friend dumped me. What should I do?
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