I don't understand why women are so difficult if their being friendly or not?

I dont understand why women are so difficult to read if their being friendly or not. My coworker was hot before and after my breakup, and now she went cold on me. Now, she completely ignores me and completely puts me out of existence. From the past few days, I've been trying to figure out what should I do with her and I'm now friends with her younger son, who is also my coworker who works in the same department as me. My situation is indeed touchy in inky waters. Both of us (me and the mother / coworker) get little awkward when we're both around each other.

I could ignore her but still keep it at professional levels so I can continue my new friendship with her son and when I'm around her I'll be sure not to chase her like I did with my deceased best friend's sister because that lesson was learned years ago. I'm not going through that again.

Back to my question. I don't understand women are so difficult if their being friendly or not.
I don't understand why women are so difficult if their being friendly or not?
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