Girls, Why did she block me on the dating site?

So i sent a message to a girl and I get blocked? Why? The only reason I can think of is because she maybe thought I was too old and that I was a creep? I'm 28. She was 22. I didn't think 6 years was that big a deal. Could that be why she blocked me?
Girls, Why did she block me on the dating site?
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