My boyfriend is my favourite person in the world and it feels like our lives are about to change forever - not sure how to handle it

I wasn’t sure where else to post this because I have no one else to talk to about this. I’ve been with my boyfriend for almost 7 years (I am F24 and he is M26), and we are absolutely best friends. There is nothing in the world we’d rather do than just spend time together, even after all these years. We don’t live together yet but I did move out of my toxic parents house last year. Since then we have made so many memories and had so much fun. He decided to go back to school a while ago to pursue something that’s been his dream. Now, next week he starts working 12 hour night shifts, indefinitely. I’m happy for him because this job is what he wanted but I’m trying so hard not to be so sad and scared while trying to support him. I’m worried of what our new days will look like and that once we finally do move in together that we’ll barely even see eachother cuz of the hours. He’s reassured me that we’ll figure it out and I know we will but I just can’t help it 🥺