So you are not living with him? Or you are? When you're married, it's easier, you just combine your two incomes and pay for everything out of the shared pot. But when you're living together without being married, it's harder to divide things up. Before marriage, my husband and I lived together. We paid jointly for things like groceries, cleaning supplies, rent, and utilities. We alternated paying for dinner when we went out, or for movies or other entertainment. He was making more money than I was, so if it some kind of extra expense was beyond my means, we either didn't do it, or he understood that if he wanted it so bad, he would have to pay for it without my help. And we each paid for special expenses for ourselves on our own, including pre-existing debts like student loans. For example, he bought an expensive new bicycle and he paid for that completely by himself. (Just think if you end up breaking up, who will get what. He would get his bike so he pays for that himself.) And we each paid for the upkeep and insurance on our own cars. It seemed to work out pretty well.

It is good to have an understanding of how the finances in your relationship will work, otherwise this can grow into a big issue and cause ill will between you. Can you try to speak directly to him about this (at a time when you are not standing together in line at the cash register at a store)? If you come to a mutual decision on how the expenses are divided, you will both feel more secure and like things are "fairer". Good luck.