I sent a message to care about her and told her to go to bed early. She said you cared about me. So sad! Help me explain what she means.

Maybe she was not in a good mood when she said this, or she wanted to talk to you, but when you came to the message, she was already put on the bed and didn't even talk to her. Girls are so grumpy, don't take it to heart, just make her happy. In the future, she should learn to be more concerned, considerate and pampered, so that her little temper will be less.