My boyfriend didn’t tell me he has a graduation party today.. is it normal?

So we been together for 2 years yesterday we had a little argument but then we were fine.. he didn’t tell me he has a college graduation party today i saw it from a post he shared.. is it ok to be worried or im over reacting? Like should not he tell me even if no one should attend at least to know he has a graduation today.. does that mean im not important to him?
My boyfriend didn’t tell me he has a graduation party today.. is it normal?
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