My friend called me heartless
I am sorry to hear your friend did that. How did your friend calling you heartless make you feel?
I don't like it when people tells me that I'm heartless, it made me feel terrible.
That's hard to hear, your friend needs to have a little more tact. Your feelings are completely justified and I hope you can confront them about how you feel.
She was being really rude to me, I don't understand how being called heartless would be beneficial to me.
I assume something happened with your friend to call you this. You should see why your friend would say this to understand the issue yourself.