I totally agree with Rob's answer, but wanted to elaborate on the finances part.
I suggest having a serious conversation about it where you get down to the nitty gritty. What are your debts, spending habits, credit scores, obligations, etc? Is one of you more of a spender and the other more of a saver? Do you have similar financial habits? Do you have common financial goals? How would your joint financial lives look? How do you feel about giving financial help to aging parents, or siblings in need? How will you make financial decisions together?
Given the number of couples who divorce over money, this is a super important conversation/s to have.