Why would a girl wish you happy birthday and react to your FB posts but not answer a message you sent her?

Women are very weird creatures... they call you "love", talk on the phone, lead you on, then go silent, cold shoulder act cold like I was some stranger and then call you friend?

Yet she leaves me a nice birthday wish on my FB page and "love" a lot of my fb posts. Yet she can't even reply to a personal message. I'm thinking of approaching this with consideration empathy and understanding. Or just say f* it and just not acknowledge her at all period!

I don't think I hurt her feelings because she said she would let me know. I really don't care what she does in her personal life or who's pogostick she's riding because I'm no stalker or creep and I have my own life. Maybe she's damaged goods...

Why would a girl wish you happy birthday and react to your FB posts but not answer a message you sent her?
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