The ancients said that if love lasts forever, why should we be together day and night? Don't worry too much. I am also in a long-distance relationship. Although long-distance relationships have many problems and troubles, we must learn to trust each other and believe in the power of love.
I suggest that you make a pair of real-life dolls of the two of you. Choose some happy photos of you together as your avatars, and make them into a pair of real-life dolls. Then you can take each other's dolls and put them on the table. Every time you see them, you will think of each other.
Or you can order a crystal music box online. Put your sweet photo on the lid of the box, and choose a song that you both like and has a story between you and put it inside. In this way, every time he opens the music box, the past will come to mind, and he will definitely miss you.
I sincerely hope that the lovers of the original poster will eventually become a couple, and I wish all long-distance relationships in the world will be successful.