Why are women so sensitive to me?

When most guys hurt a girl's feelings, they just get bitched at or broken up with, but when I do it it's like they're completely devastated and they act like I ripped out their heart and stomped on it.
Yet they don't break up with me. They just act like I did something really horrible to them when I didn't.

Example: I was grumpy the other day and kind of ignored my girlfriend a little. I wasn't mean to her and I didn't say anything bad, but she's acting completely heart broken and giving me the cold shoulder. She said I'm killing her and she's going crazy.
She's not the first girl to react like this to something so minuscule either.

So what the problem is?
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+1 y
And just FYI, none of these girls are known for being drama queens. So that's not the issue
Updates
+1 y
They're genuinely hurt and I don't understand why
Why are women so sensitive to me?
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