Am I being unreasonable or is he?

My boyfriend and I were supposed to go to my dad's house today for Thanksgiving dinner (it was the only day everyone could all get together). boyfriend was supposed to get off of work at 3pm. He decided he'd rather stay overtime at work. We only have 1 vehicle and he has it since he's working today. I don't want to Uber with 2 toddlers. I don't have their car seats anyways. We always go to his family for all holidays. We never see mine and I'm tired of it. Since he did this, I am not going to go to his family's Thanksgiving dinner either. Would that be unreasonable or am I overreacting?

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1 y
The kids are not biologically his..
Am I being unreasonable or is he?
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