All I wanted was to listen

There is this girl I got to know mid this year, and before I could say much, she informed me that she was happily dating and I should not waste my time. While I appreciated the candour, and the fact that she did not waste my time, I felt I had been cheated. Yes, every one deserves a chance to say what they feel before they are told off. I was interested in getting to know her, and over time dating her. But the way she summarised my motives into one short brutal sentence was rude. Usually a girl gives you a chance to talk before she turns on the mean rude face. But not this one.
I have heard of cases where guys attempt to catch a girl’s attention and before the poor fella can even utter one word, she zips him up with a brisk ‘not interested!’. I had not met such a girl, since the ones who turn me away usually give me a chance to spoil things for myself. So when this girl told me about her man (as if I cared), and how she was not available for the likes of me, I felt these fellas’ pain. She did not even have an engagement ring, something I commented about, and to which she replied that she did not need one, her man was enough for her. I simply walked away. There was no hope for some one like her, she was a lost cause to the male species.
I run into her about six months later, at a shopping mall. I did not think she would remember me. She was not looking so good, honestly, but me being the polite keep-no-grudges-kind of fella, I walked over and offered to help her with her shopping. Surprisingly, she remembered me and apologised for being rude to me, and wished she had my number so she could call and apologise.
Alright, we have all done a few regrettable things, but this girl was carrying on as if she had insulted my mother. I told her it was past, and well, me helping her with her shopping was a positive gesture, right? She smiled sadly, and kept quiet. Which prompted me to ask if she was alright. No she wasn’t. The same guy she had been so quick to abandon the world for was at the same time dating another girl, had proposed to her last week, and the wedding happened on Boxing Day.
This made me feel really horrible. I mean, I would not wish this on any girl, however harsh she had been to me. I did not know what to say, and thinking it might help, I offered to buy her coffee - in really good faith, but girls being girls, she looked at me as if I had insulted her, and she shook her head in that ‘are you totally out of your mind?’ way. Confused, I explained that if she wanted to talk about it, I would be at her service. That is when she said: “What is wrong with you guys? I have just told you my problem, and all you can think of is “hey, she is available, it’s my turn to break her heart”. Is that all you see when you look at women?, things to use and move on so that others can use?”
She had misinterpreted my motives, but I had no gap to clear the air. She grabbed her bags from me and stalked off. Honestly, what is wrong with girls?