Girl's Behavior

I met this cute autistic girl at work who behaves unpredictably, is this common for girls?

This girl is 19 , and we’ve been working together for a month now. She’s autistic, never talks much , just replies to everything with a short answer, never initiates a conversation. I asked her out to dinner and she says yes, then later she thought it was a friends thing and pay for her own food. I asked her if she hangs out of anyone and she says doesn’t. After a while i asked her out again when she was free and she rejects me and then friendzones me. I was always helpful and good to her, never made any mistakes or said anything wrong. She never says bye to me and rarely says hi. Then one day i leave my job and came in to say my farewells to her, she says it was nice of me to do so. Then i went to hug her and she used her arms to block me and says dont hug me. I asked why and she says it makes her uncomfortable. Just want to know if girls are usually like this, cold hearted, rude, or if it’s a rare case.

I met this cute autistic girl at work who behaves unpredictably, is this common for girls?
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