What does it mean when a girl says its too early?

So I've liked this girl for a while, and she broke up with her boyfriend about 2 weeks before I asked her out. When I asked her out she was all smiles and giggling, but said "I think its too early. I just got out of a relationship." with her hand on my shoulder. It felt like I was getting mixed signals, what does this mean?
What does it mean when a girl says its too early?
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