How to work out a relationship with an extremely busy bf?

My bf and I have been together for 2.5 years, and we are both working adults.

When we first met, my bf was decided to quit his office job and join the uniformed service to contribute to the nation’s security. During the training period, while it was busy and tiring we still managed to meet 1-2 times a week and spend some undisturbed quality time together.

After his training had completed, i realised he became very much busier. I would see him work from 8am to 11pm regularly and occasionally clocking overnight shifts. Very often, he would also return to work on weekends to settle additional work and it could take up the entire day, leaving him only 1 rest day out of the whole week.

Our communications were significantly lesser now due to his busy schedule, and whenever we meet, he will also be busy on his phone, settling work issues or zoning out from tiredness.

I have been keeping myself busy with work and taking up extra activities such as swimming, jogging and yoga so i will not be too dependent on him and feel lonely when we are not together. However, recently i have been feeling quite a bit of disconnect in our relationship. We have not been updating one another about our lives despite having a daily 3-5 min catchup calls and i no longer feel as eager sharing interesting posts and videos that i came across online with him as he never had the time to look at them. Our whatsapp chat also became somewhat like a reporting platform where i will inform him my whereabouts. Occasionally i will message him happenings at my work and get a ‘yes/no/sorry i busy now’ reply. While i feel upset about our current situation, i cant bring it up as it is unfair to him too.

We discussed about applying for BTO within the next 0.5-1 year and settling down with a kid in the near future. But seeing as his schedule is so packed, im feeling somewhat uncertain about our future now, worried that I will be neglected and alone in the relationship.

To those married with a busy spouse, how do you deal with such feelings and prevent a disconnect in your relationship?