Long-distance love is a big difficulty for all couples. You know, the most common problem for couples at this stage is mutual distrust. If you can give enough girls a sense of security, the problem of girls' trust in you can be largely avoided.
For boys, the best way to give girls a sense of security is for girls to reject the ambiguity of other girls. You should know that some boys' personalities belong to the type of central air conditioning, which is very warm to any girl. As your girlfriend, you really don't want to see you show your gentleness to other girls, because they are afraid that you will be tempted by other girls. Especially now that you are not together, she can't always be with you, and she doesn't know much about what happened to you. If she knows that you are having an affair with other girls, she will definitely think about it.
In addition, you should tell your girlfriend what happened that day or what is very important to you every day, so that girls have a feeling of knowing each other well even if they are not together, so that the distance between your hearts will not be alienated by distance. Of course, I don't want you to tell her everything, or I want you to tell her something important to keep her involved in your life.
It is also very important to keep in touch with you, and try not to let her lose sight of you, because if she is not together, she will be very anxious if she can't contact you again, so this must not happen.