Men need attention. They need it as much as women do. If you are really ready to devote time to this, and take regular steps of attention and support to your partner, then you will succeed. Guys will never tell you how important it is for them to feel and know that they are waited for, respected and considered special, even from a distance. Here is an article about that https://superratmachine.com/how-to-make-him-feel-special-in-long-distance-relationships/ and I think here you will find the most detailed answers to your question.