By all means, feel good about it. There's just nothing else to read into. It's not a call for you to move towards her.
Take all the psychoanalysis out of the equation.
Every human likes a positive, pleasant interaction with another human. Period.
Your W does not want to hate you. People don't walk into the grocery store planning to hate anyone...
It is only when our emotions are triggered in the experience of someone that we begin to place people in specific "boxes". It could be a conversation, it could be what they wear, it could be body posture...
And in order to process our emotions over our experience of someone, we start to... project... unto the other person... we begin to mind read...
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If this processing is occurring with someone we have regular contact with, maybe the cashier at the grocery store, the co-worker, the people who go to the same parties as us...
It's CONSISTENCY in this experience that ultimately establishes our mindset as to whether this person is someone we wish to have regular or more contact with... or not...
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Your W isn't done with you, yet... as mine isn't done with me... the why...? Only THEY know... if they even know...
If your W was done with you... she'd be done... she would not have sent you an email...
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So yes... you had a positive interaction with your W and that is something to remember... she'll remember it as well... but it is just as likely to have nothing to do with the M... just two people having positive conversation...
And in that... you did well... and you are doing great...
