Couples?

Me and my boyfriend have been

Together for about 7 years , we tend to argue a lot about finances and bills . He’s self employed but he can sometimes

Make double what I make a month depending on his sales. I work full time at a hospital. (We’re thinking about getting married soon). With him

Making more than me at times should the bills/expenses be split 50/50 or should he pay more than 50% of the bills ?