I'm upset at my boyfriend for always commenting on how messy my car is
Why do you think he chooses to comment on your car so often?
I just think that he wants me to be angry with him because why else would he comment so much about it?
Its ok to be upset if your partner keeps criticizing you. It is important for partner's to realize that there are certain things that should just not be beaten to death in a relationship. If you partner often has a messy car, commenting on it each time you see it is just beating a dead horse.
I will see about that. He needs to learn that his assertive comments such as that have consequences.
I agree, as long as you tell him how you feel without using inflammatory language, I think this will help the both of you.