The previous answer is correct in a nutshell. I had the same thoughts.
I just want to say in my own words that what you could do is the both of you together really need to talk about your relationship and make an agreement before your discussion not to argue but to actually talk about what you are looking for in your relationship. Nine times out of 10 I guarantee you, it is not you but something else. There is a build-up of frustrations due to other matters and it taken out on you for the smallest things. People just respond like that. They are overwhelmed and just can't deal with it. The bottom line is to talk and be open and honest with one another. This will open your eyes and help you in making a decision for your future.
I just want to say in my own words that what you could do is the both of you together really need to talk about your relationship and make an agreement before your discussion not to argue but to actually talk about what you are looking for in your relationship. Nine times out of 10 I guarantee you, it is not you but something else. There is a build-up of frustrations due to other matters and it taken out on you for the smallest things. People just respond like that. They are overwhelmed and just can't deal with it. The bottom line is to talk and be open and honest with one another. This will open your eyes and help you in making a decision for your future.