She isn't excited around me anymore?

Just last week, whenever we would meet up, she would be so excited and sort of hyper around me. We went out to dinner, and had a good time together.

Now, when we meet up, it just seems like she's bored of talking. She's not laughing as much anymore, and it was like this for this whole week so far.

I probably messed up. Should I give up hope of being with her? I asked her out (not a date, but to a biking trail) and she showed some excitement but that's it.
She isn't excited around me anymore?
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