Is my boyfriend petty?

There’s a lot of miss communication through text and sometimes I might say something and it’ll bother him but he wouldn’t tell me!!!! Like today I told him to shut up, but it was like a playful shut up, not a mean one 🙄🙄 later in the conversation I put “haha” and he told me to shut up 😂😂😂 at that point I was like “okay wow he’s mad over that.” But what the hell??? I wish he wouldn’t hold in his anger and assume all the time. He easily could’ve questioned me about it but instead he let it ruin his day for like 4 hours. And the way he addressed the issue 🙄🙄 I’m 19 and he’s 21 and I feel like in our culture it’s normal to be passive aggressive. Call me Americanized but I really don’t think its necessary! Look at this

and tell me he isn’t being silly