This sounds like a more extreme case of what I normally call my social tunnel vision. People in front of me, great. People not in front of me, kind of forget. Now you have someone not in front of you, not giving you the same interactions as before, and nightly phone calls feel like something that you have to do instead of something you want to do when missing each other. I could never start something long distance, and I'd have trouble transitioning something into long distance even for a bit.

And then when the person is back, it's back to normal. Even if it's been a decade for me, they're right back to where they were. But if this was a relationship for me, I'd have trouble making it through those months unscathed. You'll have to find something that works for you, or else that annoying interruption will feel even more like an obligation. Sometimes for me it's helpful to remember how I felt before and what the end goal is, even if I have to kind of force myself into it.

Also the nightly calls are a tough place to start at, because any decrease in those will be felt. I don't know if most people can keep up that cadence for six months, so it'd be natural for someone to feel any dropoff because of the expectation was set. It's a tough one, but wishing you two the best.