Why would someone put a massive amount of effort into the chase/seduction, then ghost the person when they make a move?

StevieBlunder
Why would someone put a massive amount of effort into the chase/seduction, then ghost the person when they make a move?
A couple times in my life, women have put a huge amount of effort into the chase/seduction, showing every sign of comfort, excitement, trust and sexual anticipation: including handwritten letters and little gifts. Then when I make a move *poof*, they've vanished like a ghost, to avoid me after that.

When that happened, I felt kind of crazy, like I'm lacking social awareness, like maybe I have an overactive imagination and imagined things that weren't there; and that self-doubt can take a toll.

When that happens, should I assume they have emotions baggage that has made them neurotic and distrustful, or they are narcissistic and lack the ability to see anything except what is in their head?
Updates
+1 y
Women who have done that have told me I'm the whole package and trustworthy, and have idealized me.
Why would someone put a massive amount of effort into the chase/seduction, then ghost the person when they make a move?
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