I’m stuck paying for all the adult stuff

My girlfriend and I have agreed to keep all spending separate, and the two of us have different ideas on what is necessary and what is not.

I really would love to just save my money for important investments, and my girlfriend prefers going on spending sprees that spruce up the house.

It is better that both of us keep to ourselves spending wise. There is less fighting and concerns when a package comes in the mail. Unfortunately with this method, it is hard to decide who buys what! Who buys the groceries for the house? We can’t split the bill since one of us consistently begrudges the other for buying something. My girlfriend doesn’t drink and refuses to buy beer. Well I don’t want to buy her tampons then, but another issue is important services like HVAC, plumbing and electrical. I think it is important to get a HVAC tune up at least once a year. It keeps your heating and cooling device genuinely working at the optimal efficiency, and you have lower energy bills and less HVAC repairs overtime. My girlfriend refuses to spend any money on a HVAC tune up. It is not a fun expense and she doesn’t see the value. I consistently get stuck buying HVAC tune ups, HVAC duct cleaning and HVAC repairs. I don’t like spending my money on it either. I wonder if both of us can do a rotation schedule on who buys what for necessary items. I don’t always want to buy the boring, adult stuff. I would love to buy myself expensive clothing, shoes and all the other stuff my girlfriend gets on a weekly basis.