I agree with robinh, it is a test of your life survival skills.
My mom is a minister (retired) - she helped me keep it in perspective:
All you need to get married is 1) the license, 2) the couple, and 3) a witness (or two). Everything else - and I mean EVERYTHING, is gravy. You don’t need rings, you don’t need family, you don’t need flowers, you don’t need pretty invitations, you don’t need flower-girls, or attendants, or ring bearers, or friends, or fancy clothes, or anything else at all. All that is just fluff to make pretty pictures. Nice, in many cases, but not at all required. What is important is the symbol, not the object. I keep breaking my wedding band (I’m rough on rings) but the band itself is immaterial - what matters is that I’m married to a great guy who is my best friend. It could be a cigar band, and that would be fine - it is the symbol that counts.
So, why are you fighting about inconsequential stuff? If you are fighting about whether or not TO get married, stop, and don’t do it. If you are fighting about who to invite, how many to invite, what color the flowers should be, what kind of china to put on the registry… those are little stuff.
OR, are you fighting about big stuff disguised as little stuff… the same fights you’ll keep having (in disguise) for years until you work them out. Is my family more important than your family? Whose emotions take precedence in an emotional situation? Who gets to make the final call on financial decisions? Is your mother more important than your future wife? Is her mother more important than you? How will we entertain, decorate our home, celebrate our most important events? Whose idea of ‘party’ is more fun (and/or whose idea of party ‘wins’)?
You are working out the very beginning of who you will become as a FAMILY, later (even if you never have kids). This is the first layer. Pay attention to how you fight (do you get mean, does she get weepy?), and how you resolve things (do you give in, and why, and under what circumstances?). Stepping back and looking at myself was one of the best things I did when I would get upset about wedding stuff. I learned a lot about myself that way.
Learn how to manage the fighting NOW. Look at the big picture, don’t let yourselves get caught in the details.
epeepunk and I did our ‘own’ wedding for the most part - down to the invitations (I lettered them), the wedding dress (his great-aunt made it), his kilt and doublet (I made those), the wedding certificate (Quaker, we both did that)… we planned it to be a party, one where our friends and family could have a good time. LOTS of planning, to make things go smoothly. (Hot tip - make sure that there is someone who can handle all the details ON the day… you don’t need to be handling problems with the caterer while you are trying to enjoy your own wedding!) We learned a lot of negotiation skills - I gave in on some stuff, he gave in on others, I picked out three options I could live with and he selected his favorite of those, etc.
In addition to having the advantage of a minister-mom to offer perspective, we were fortunate that I did NOT have an ideal wedding in mind. I didn’t have a fantasy from childhood that needed to be fulfilled. Makes it a lot easier. If you have dreams, and your future spouse has dreams, you have to learn how to treat the dream gently, even if you MUST change it (say, you can’t afford the carriage with six white horses). Sometimes it isn’t the grown woman’s heart that breaks because she can’t have twelve flower-girls, it is the 7-year old girl inside who throws the tantrum because her dream broke and nobody can fix it.
Good luck! Our wedding was a huge blast, loads of fun, and exhausting. You don’t get to see everyone, except in passing, and you probably won’t have much to show from it except the pictures, and the memories. Even the stuff that goes wrong makes good memories, if you keep your perspective. And don’t lose the license!