How to tell if a girl is interested in you, even if you don’t get her number?

I met this girl and she remembered my name and everything, every time we talk she is always giggly, stuttering and turning red but didn’t give her number but still wants to talk to me when I see her. Is she still interested and wants to take it slow or she isn’t interested
How to tell if a girl is interested in you, even if you don’t get her number?
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