Is it my period or just me ?

So I just got my period and I'm guessing I've been moody lately but in my town there's a fair going on and I asked my man if we should go. He said no cause apparently he didn't wanna see anyone from school, I was cool about it cause I was kinda feeling the same. I had to work yesterday so I didn't get to see him at all. While at work he told me he was going to the mall with his best friend I was like ok and told him to text me when he gets home. He did and I had asked him how it was and what he did. Turns out after the mall he ended up going to the fair with his buddy, which pissed me off cause he told me he didn't want to go. This really upset me what do I do?