Dating

What would you do in this situation? How would you react?

My HighSchool crush recently got in contact with me and I was surprised when she did and I was also a little happy too. We began to chat a little and had a video call then proceeded to vibe and catch up a little. After we started talking for a bit, she then proceeds to tell me, in confidence, that she regrets not giving me a chance and she has wondered and has been wondering what her life would be like if she did give me a chance. During HS she knew how much I liked her but we still remained as friends. Even tho this news bring me a bit of joy and excitement, I still am not sure how to go about this. elp :(

Context:
I am 23yrs old and so is she.
She is married and has a kid. She lives in the same state as me.
Husband is in Mexico
Go w/ the Flow; Ride it out
Stop!; Dont waste your time.
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What would you do in this situation? How would you react?
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