Does he prefer directness? Could he even have some autistic like traits even if not autistic?
In the past, I could have seen me doing something like this before I developed some more self awareness and intention into seeing a partners pov when it doesnt always come naturally (altho 3-4 days without a text after 10 months would have been pushing it even for me!):
E.g. I would have fully meant what he did about next level once home. But I might also have been very single minded and focused in the moment of what I was doing whilst away. But id assume that was ok unless told otherwise because:
The 10 months had gone so well, i'd expressed my desires for when i got home and hadnt taken that back, and there had been a chat beforehand that it was going to be a distant/tough month.
So I would have felt 100% secure in the relationship myself, and like the lower contact had been sign posted in advance.
It might not have even crossed my mind you might lose that sense of security and connection despite the low contact (as i wouldn't have), unless you told me directly.
None of this makes it ok btw, and I wouldn't do it now. But just a thought.
But crucially, I also would have been devastated if I knew I was hurting my partner. But id have needed an annoying amount of directness to realise that 🙈:
'Hey, I know you're really busy while you're there, and we discussed how you'd be away. But im finding only texting every 3-4 days hard - I miss you and our connection. Its making me wonder if something is wrong, even tho we agreed to move to the next level once you're back. I would feel more connected if we texted and talked more while you're away - can we do that?'
His reaction would be telling.... If its anything like 'omg you're so needy' or 'come on, you know im away', or he's otherwise shifty
And not something like:
'Omg, im so sorry ive upset you. Ive been distracted but now i know its been bothering you, then of course ill text more, and how about we have a call on x day. Thank you for telling me. And i definitely meant it about when im home - cant wait to see you and go to the next level x'
Then id be worried.