It has helped to mentally count down. My SO doesn't respond positively to repetition, so calling him with "21 days! 20 days!" would 100% annoy him, but I know he's counting down too.
On the other side of it though, it almost makes it seem like a footrace. Who will win: the end of the long distance, or the end of the relationship due to anxiety, impatience, misunderstanding, and growing distance. I can feel the distance between us grow; we've only been dating for a year, and I knew him for a year before that. We are such different people, the unlikely opposites that seem to work well together, only it doesn't work as well when you remove the physical chemistry from the equation, and we don't have years of history to keep conversation fresh. It's becoming a repetition of "wyd, sightseeing, lemme see, [sends photo], that's cool you going to the gym?, yeah after this maybe, whens your next game?, next chip starts friday" (sometimes as one-sentence as that looks, sometimes lengthier, but in essence the same) and then we share memes, we sext once in a while, we complain about work, and that's it. No new experiences for 4 months.
And to expand on what I wrote above, I do love the dude, and when we are together, it's RIGHT. But simply put, things are never stagnant, they're either growing or shrinking, and it's hard to grow a relationship sans physical contact when you don't have a significantly long history.
We are 12 hours apart. My 2PM is his 2AM. I start my morning at 7AM waking up and getting ready for work, but I don't usually text him until I'm at work so I can make it on time. So I usually start conversation around 8:30 or 9AM, which is his 9PM. We talk through the first half of my shift, and he usually sleeps at like 3AM. I get off work around 6PM, take a nap, and go to the gym at 8PM, which is his 8AM, so he's usually waking up to go to the gym himself. We talk until I sleep at 11PM to midnight-ish.
Every day we got about 10 hours to talk. We don't always fill up that time. At this moment, he's at the club, so I'm not bothering him, and probably won't hear from him until 2AM when he's waking up from his hangover 2PM his time.