Why does my boyfriend get irritated at little things I do or say?

He likes to nit pick at everything I do , petty arguments! Gets mad if things are moved from where they were, if I add my opinion to something he is telling me! Like wtf is wrong with him? It’s everyday! Little childish things he raises his voice and gives me this stare with his eyes wide open, it’s not serious but he always makes it.
Why does my boyfriend get irritated at little things I do or say?
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