Years ago i had a chick try this with me also. She wanted me to be her plan b. She would come out of the wood work show high high levels of interest for a couple of weeks then vanish only to repeat the cycle. After the 3rd time she did this i went into 100% ignore mode.This is what I thought exactly .. Just going to be short with her .. In all honestly I'm not even bothered .. Was just curious to find out what her game is? And she's never ignored me .. Always very receptive and quick to respond. I think she does like me, it's just that we've dragged this on for so long she's uncertain, I'm uncertain if you get me ..
I found out she had a on and off relationship with her bf. When they would have a blow up then she would look for validation and attention from me. I went 100% ignore mode and she made over a dozen different attempts to try to draw me in over a year.
So just to let you know, she will still try to sucker you in even though she had no intentions of actually dating you