What is the significance of sending photos?

I sent you a photo because I want you to think about him every day. Don't forget him. I want to say that he loves you. I hope you can watch him and love him every day, watch so many TV plays and know so many romantic occasions and scenes. I sent you a photo because I wanted to tell you that he loves you. I hope you can put his picture in a place where you can see it every day and think of him. Generally speaking, such photos are usually sent when you are apart, and only when you are particularly sad. Because you can't bear to leave your sight and life, I'll give you the photo. I hope you can remember that there is such a person who thinks of you silently in the distance. I hope you don't forget him, and you must remember him. This kind of emotion is like unrequited love and gratitude.