Girls do you ever like a guy until he likes you back; then you can't stand him?

I can totally be the one pursuing the guy, but when I find out he likes me back and he gets all attached to me, I don't like him anymore. Is that normal? or is that me finding things wrong with him because I'm not completely self assured? or is it because he was too easy to get and I want more of a challenge subconsciously? I cannot for the life of me figure out what my deal is! anyone else do this too? guys too. and guys why do you do it?
Girls do you ever like a guy until he likes you back; then you can't stand him?
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