Ideas: Shifting finances into marriage?

Hello, my husband said that he is dissatisfied with our financial division and somehow we cannot find a common denominator of comfort regarding our financial situation. Since our marriage is not the easiest and there is always a possibility of separation, I want a fair division that both of us feel comfortable with. The goal is of course to maintain our marriage, but I still want to consider the worst-case scenario. Investments etc. are important to him, while I'm concerned with finance