It could be many different things, including some that have little or nothing to do with you at all. It's hard for someone who doesn't know you to decide.
If you see her again, feel free to say "hi" and smile, but if you're afraid that you came on too strong, consider letting her do most of the talking for a change. If you remember some details about your previous conversations/texts, ask a follow-up question to express your interest in her--but don't drill her as if you're interrogating a crime suspect.
If you can, try to find a sort of give-and-take, like a game of verbal "catch". Even if it doesn't lead to a serious relationship, you'll have learned something about an interesting woman (she sounds cute, too!) and will have practiced some conversation skills--which don't always come easily for anyone.
Personally, I've found that the most successful romantic relationships in my life, including my still-happy 21-year marriage, started off as friendships, anyway, so don't put too much pressure on yourself--just enjoy the time you spend with her for whatever it is.