Is it really always my fault?

Alright for some brief info, I've been married for almost a year now and my husband is an amazing man. He's everything and more that I've ever wished for in a husband and a life partner. I'm always thankful and so happy to have him in my life. He really turned my life around in a moment of my life when I really needed it. His humour has always been what drew me in and of course once I'm caught in that, everything about him is charming and he's so charismatic compared to me who's a more calm and quiet person.

What I'm trying to get to is, lately we've always been arguing and it always ends up being my fault somehow and I do really believe it is my fault most of the time. When we do argue it's mostly due to misunderstandings and different perspectives on things. For example the other day we were on our way to my in laws house and before we hit the highway we decided to get something quick to eat. I wanted McDonald's where he wanted taco Bell. I know he didn't want to go to McDonald's ever since their dollar menu practically consists of drinks now only. So I complied to go to taco Bell but I don't really like their food so I just got the cinnamon twists instead. When I ordered only that he got mad and said ,"why are you being so difficult? You're always complicating things AGAIN" And I told him Iwasnt really feeling taco Bell so he ordered his stuff and we went on our way to my in-laws place. On the way there he was going on and on about how he doesn't understand me and why can't I just make up my mind, why I always put my needs before us, why did I even wanna go to McDonald's when they don't even have a good dollar menu anymore. Basically calling me selfish for not considering our financial situation and wanting to go to McDonald's and that I'd probably pay $500 for a McMuffin if I wanted one.

He goes on and on and on and I'm a crybaby.. I cry so easily. I hurt so easily. But I just think to myself that I can't cry cause we're going to my in-laws place and I don't wanna show my face like that to them. Every word he says to me really hurts and I can feel my heart just shivering and quaking at every word but I hold it in. I try to explain to him that I didn't think it would make much of a difference if the price went up like 50 cents since we hardly ever go eat out but he goes on to tell me that's my problem. That if I want something then and there that I would pay any amount for it and I told him no, that Im always considering our financial situation before I make a purchase or decide to buy something. I just keep quiet after that because whatever else I say is supposedly me trying to tell him that I'm selfish.

So when I don't say anything for a while and let him finish talking, he tells me "you're pathetic" and I don't know why... But that small comment really really hurt me .. it hurt me so much that I just couldn't hold in my tears. My heart felt like it was being stabbed. I know it probably doesn't mean much to you guys but in our relationship respect is a big thing and I could never ever call him such a thing. I would never be able to call him any bad names or suggest he is something bad. Not ever.. the way he said it really hurt me and after that it's been on my mind. He's always said all our problems are my fault and that he's done with me and he's driven off from home a few times leaving me to wait and wonder where he's gone. When he does that I'm always a baby running outside to try and stop him but he runs off before I get to him..

What I'm asking is, how can I better myself or my communication skills to better express myself to him more? I want our misunderstandings to go away and I don't want to always he the one at fault anymore..