I said hi to this girl and she looked very surprised. Is that bad?

So i came to know this girl has a crush on me and i started txting her to know about her. We spoke quite a bit and she seemed comfortable. She even smiled at me when we walked pass each other. The when i said hi to her in real life (the first time we ever spoke irl) she was very surprised. So what does that mean?
I said hi to this girl and she looked very surprised. Is that bad?
Post Opinion