After breaking up, I have to look through my cell phone text messages and phone records. What is the reason?

Miss your ex-girlfriend, people always want to miss the past. Although the memory of the past is flawed, it can't be forgotten after all, so some people will desperately think of him as beautiful and don't want to lose it. There is also the possibility of bullying what you have. Another level may be that he doesn't even know that he has feelings for you.