Why are some women so flaky? So hot and cold?

Yeahhbro
I have run into a lot of flaky women you know? Like they seem interested one day and the other day they are not even talking to you or they are ignoring you completely.

For instance there was this girl that seemed like she liked me, but next day she was completely ignoring me and then walked away with this guy and left me in the "cold" if you know what I mean. I was like wtf?

I went for a couple of dates with this girl and about a week ago, I sent her a couple of messages but she never answered back.

Some girl give me their number and when I call them, they don't answer either.

There was this girl who would sent me crap and messages on Facebook all the time, she doesn't do it any more.

I swear I haven't done anything, I am a pretty respectful guy and if I offend somebody I say sorry right away.
Updates
+1 y
sorry I meant to say I haven't done anything wrong!
Why are some women so flaky? So hot and cold?
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