Pisces people say they miss you. Is it true?/You don't say. What does this mean?

When Pisces MM really falls in love with a person, she will read each other's text messages and chat records many times, that is, she can recite them when she sees them, and then giggle or sulk, or be suspicious or sad. I will also copy the short messages into my notebook and read them every day. Even if I just stare at a sentence, I can play back the whole conversation many times in my mind, and then think about the tone, mood and what the other person is doing. And those chat records will be memorized, and then most of them are recalling the chat content when they were punished.