Boyfriend

My boyfriend is usually funny and goofy like a normal relationship idk today seemed weird. We both went to work this morning and he’ll usally text me that he’s at work or have a good day text today he didn’t text me until 11 am he just seemed dry and off, I seen him later that afternoon and he seemed dry and off still idk why he’s not really the type to express himself but we do talk sometimes I asked him if he was okay a couple times and he said yeah but when I tried to talk , hug or even kiss he would get annoyed and just seems different idk what this means or what’s gonna happen everytime I ask what’s wrong he said “nothing “ and seems just mad