How do you cope?

Advice on how to cope with this long distance thing? We’ve been doing it for a little over a year and instead of getting better at coping, I feel like I’m getting worse. We have a wonderful time when we’re together and we text and FaceTime all the time while we’re apart. But as soon as we leave each other, I get soo sad for the next few days. I have hobbies, I volunteer, I work, I go to school, all the usual tactics to stay distracted and occupied while doing ldr.. but I still feel so sad without him. I feel like I can’t take it anymore, I don’t know how people do this long term, I just don’t want to. How do you all do it?