<human>: Can you give me a shortened version of the text?

I've been seeing this girl since May (~3-4 months)

Normally we get along great. Two nights ago I gave her a backrub and she left a really nice message on my bathroom mirror. 

Yesterday her vehicle broke down as she was heading somewhere important. She tried to call me but I was getting my haircut. She called someone else to pick her up. I called her as I was walking out of the barber shop and pulling into traffic. She explained the situation and I said something to the effect of "damn, that sucks, I'll stop by just in case you still need a ride". 

I stop by, she had left. Called her, everything was fine. She was where she needed to be, she would deal with her truck later. 

I go home and look at the nice message on my mirror. Everything is great. 

Then I'm watching TV four hours later and she sends me a 10 paragraph facebook message telling me I was cold on the phone and wasn't sympathizing with her situation enough. Regardless of me wanting to help, she wanted me to commiserate more. Then she says she doesn't feel comfortable calling me during important situations because she's worried I will be cold and not empathetic. To date, that has not happened, she's just worried about the *possiblility* of it. 

I told her I was confused because I thought we had been doing great recently and I believed the vehicle incident was rather small, but small things can add up over time, and when they become *big* enough, they should be addressed. I told her I had a past relationship where every small incident was escalated and had to be discussed, and learned eventually that can be pretty poisonous and not to worry about the small stuff. She said she *wants* to worry about the small stuff.

Am I a cold hearted asshole? Should short periods of emotion always be expressed?
<bot>: girlfriend got mad because I couldn't sympathize well enough on the phone in traffic and believes every small incident should be thoroughly discussed.