So my DH and I were in a long term relationship for 6 nearly 7 years before we finally moved in together. For the vast majority of that time we didn't have a plan for how/when we would move in.
He didn't have commitments/connections to where he was beyond post grad studies followed by first jobs. We always knew his industry was geographically quite limited; so at one stage he even moved further away to get the right job. I could have followed/moved to him for most of the time we were apart; but it suited my career better to be where I was so I didn't.
Even when we got engaged and planned the wedding, we didn't move in or make plans for that. We wanted to enjoy the wedding first, and find the right place between our jobs without stress/rushing it. In the end we didn't finally move in until 7 months after we got married. (It was a little odd getting back from honeymoon on my own).
I really feel the whole time it only worked because we knew we were committed to each other, so didn't make demands or have fixed routines. We spoke/texted loads and saw as much of each other as we could; BUT there was no fixed plan. No "we must speak on these days or at this time". Or "X will go to Y every 2 weeks or once a month" etc. Or "we must move in at x point".
Yes there were times we really missed each other. We never spent Christmas day together until we got married. But on the flipside, it actually gave us a lot of freedom to do what we needed. In our case to put study and jobs first; but it could just as easily be parenting or friends.
So my advice would be, if he ticks all the boxes otherwise don't stress the geography. Do keep the communication open and frequent, and trust the move in will happen when you are both ready. We've been together 14 years in total and I wouldn't have changed how we did it.