Am I overreacting?

Looking for an opinion! Not Mommy or baby related... Just don't have any friends to ask or vent to. So my boyfriend, myself and our newborn live together and my 9 year old is with her dad this week. We've been very strapped for cash lately and kind of have this schedule where we hardly eat during the week that my oldest isn't with us and eat just enough during the week she is with us. My week with my oldest starts on Monday. Today is Saturday. I'm just starving so I decided to eat whatever I can find in the kitchen. I found a hamburger helper and even though we don't have any meat, I figured I'd just cook the pasta and the cheese that comes with it. It really rubbed my boyfriend the wrong way that I was about to cook this without the meat. I let him know how starving I was. He accepted it but didn't like it. Not that I'm cooking it but the fact that I was going to cook it without meat.. I ended up not cooking it because we figured we'd go get groceries today instead of tomorrow. As I'm prepping the baby for the cold and on our way out, he's giving me attitude. I decided not to go to the grocery store. I didn't want to deal with his attitude or his silent treatment. He drove off with the baby and the key. I'm sitting out here waiting for them to get back. Did I overreact by not going to the grocery store? I don't even know what to say when they get back.