Taken for granted?

I want to start by saying that my husband does have a very hard and busy job. But because of that, I really take our time together seriously.

Today was a big day at his job but he also had the day off today, which I was super excited about. I’ve been double checking with him that he’d be off today for the past 1-2 weeks because he gets called in on his days off a lot. So I wanted to double and triple check he knew for a fact he’d be off today. He even called his job last night to make sure they do not call him in today. I was up at 5am doing laundry, cleaning, did an “everything shower” so we could have a relaxing day today. I woke up to a text from him apologizing and saying he felt so bad telling me but he decided to go to work. He said that he didn’t want to miss the big day at his job (there was a big and important event today). This isn’t the first or second time this happened. He said he feels really bad, but it doesn’t mean anything to me anymore. I can’t help but feel like I’m being taken for granted. Am I being dramatic? Is this divorce worthy?

Adding: he’s not cheating. His office is all men and none of them are the type to cheat. It just seems he loves his job and coworkers/friends more than me.