What does it mean when a girl says 'awe'?

Anonymous
This girl I'm interested in was in one of my classes a couple of years ago and I just recently started texting her (within the past couple months). I invited her out with some of my friends and said she should bring some of hers. She responded by saying 'awe I'm exhausted but have fun!'

is she flattered or is the 'awe' the same kind of awe she gets from seeing a cute little puppy. Like saying its cute and amusing you would ask me, it was a nice try but that's not gonna happen.
What does it mean when a girl says 'awe'?
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