Why did my boyfriend get mad at me when I acted happy to see him?

My boyfriend was out of town for a day and when he got back I acted happily (danced on the spot a bit) and told him I missed him. He got angry and told me that my reaction was too much and that he was only gone for a day. I responded that I was just happy that he was back and asked why it bothered him. He started telling me how it was only a day and he doesn't think I should have reacted the way that I did. He blew my reaction out of proportion and obviously my mood went down so I went back to studying (which I was doing when he got back). He was quiet for a bit but then he started the convo again. And I didn't act in anyway. After he told me it was too much and I was too happy I just went back to studying and thought I'll let him be/cool off or something. He kept starring at me and then went off about how he still thinks it was too much of a reaction and whatever (like he was trying to justify his reaction). I told him I really need to study and I get it, but he should give both of us a bit of space. We left me alon for like 2 hours and now he's back and he's not mentioning the conversation, I don't know if it still bothers him, I have no idea what happened and what exactly annoyed him so much.

Why did my boyfriend get mad at me when I acted happy to see him?
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