Even if you are in a serious relationship it doesn’t mean that you need to be serious with each other. What I mean is, try not to have stiff relationship you need to enjoy and have fun if you are with your SO.
I am in a LDR and we are miles apart so what we do to enjoy our relationship we usually watch movie or videos together. There are times that let each other see what we food we are cooking. And because he likes playing Playstation I always watch him play plants vs. zombies or dying light but I am his cheerleader. 😛
Always remember that even if you’re near or far from with each other you need to make sure you spend quality time together and make the most out of it. Share happy moments with each other. 🙂