He may have forgotten our date tomorrow.

I have a guy who has been on 4 dates. We started seeing each other in May of this year. We had good date last week. But before the 5 date, he asked to change the time because of urgent work

I told him that you can skip that day and put work first, but I didn’t hear anything from him after that I got very worried.
(I was ghosted by my ex and it’s still trauma. He knows about that).
I wanted to be honest with myself and told him I was worried about not hearing from you, and he never apologized but offered to reschedule. But I had to work late that day and it was difficult to make time, so we rescheduled for tomorrow.
I haven’t heard from him for the next three days.

First of all, as far as his personality goes, he doesn’t seem to ghost me and he is a very busy person. But I’m aware that his priority in life is not to date me at the moment. I will be gone for a few years next month on an overseas because of work, so I literally have no time. I don’t want to force him to see me, but I am a little confused. (He knows about my work and we have talked once about a long-distance relationship.)

I should probably text him about this tomorrow, but I’m not feeling like messaging him because I’m aware that maybe he’s not into me.
Should I say bye to him? If so, I would like to do some positive texting and be done with him. But I don’t know how to write (very confused).

Am I overreacting? If you have any advice please let me know.
Thank you