Girl at one of the stores I work out of is apparently "freaked out" by me but never gave me any indication that she was. How do I proceed here?

A little context: I do work out of numerous stores and to make my work days better, I go out of my way to make friends with the employees. The girl in question here is a manager, who for the longest time I just never spoke to. She's really quiet and shy, but one day we crossed paths and it kind of broke the ice. From then on, I would say hi to her when we saw eachother, which turned into small talk and eventually longer conversations. All totally normal in my mind. I was under the impression that we were becoming friends, just like various employees from this store and others.

So through these casual conversations, I suggest we take my dog, who I just recently adopted to go get some pizza and take him the dog park. She agreed, but I didn't set an exact time or day. So like a week later when I got the chance to talk to her, I got her phone number and suggested a day for our pizza outing. She gave me her number and was on board with the idea. I left and didn't think much of it. Later that evening I realized that I didn't send her my number, so I shot her a quick text and didn't get a reply.

So a few days later, I had my dog in the store to grab a couple of things. And apparently they had recently changed the policy to not allow dogs, so she had to be the tell me the bad news. During this exchange, I asked her if she got my number, to which she said "Yeah, I did, I'll text you later". So again, I thought nothing of it.

Fast forward a few more days, I'm in the store getting some things for my mom and wanted to update her about a court case I was called as a witness for against my unruly neighbor. I had been telling her about it as it developed. I didn't see her anywhere and when I was about to check out, one of the employees pulled me aside and said "Hey man, you're freaking Jessica out". It honestly caught me by surprise. I told him I had no idea she was put off me and told him to tell her that I apologize. How would you guys handle this? I've never had this happen

Girl at one of the stores I work out of is apparently "freaked out" by me but never gave me any indication that she was. How do I proceed here?
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