Circumstances and feelings change. I've never wanted kids so never thought I'd get married and was happy to go through life without it but then at 38 met someone it felt right with. Got divorced 4 years later.
Financially there was a large imbalance between my wife and I both in savings and earning capacity but I thought that didn't matter, ultimately it did though. We bought a house "together" (my deposit and me paying the mortgage). She hardly worked and looked after me and the house which worked well for a period of time, then she got a full time job. I lost my cook and cleaner and gained nothing. I was still paying all the bills. When we divorced I managed to keep the house, she agreed to sign it over to me in return for a lumpsum payment from my Superannuation Account (compulsory private pension account you cant touch until retirement, 9.5% of your pre tax salary). Begrudgingly agreed, paid her off, got divorced and not heard a peep since. The hole in my superannuation has been filled as I continue to earn.
I guess what I'm saying is that yes it hurts financially at the time giving up so much but you get something for that money. It bought me her out of my life, never to bother me again. Ultimately it bought me happiness and a feeling of release. Freedom! Money comes and goes. What seems like a lot now won't feel so much in a few years.
I said I'd never marry again but met an amazing girl when separated. Been together ever since. Bought and renovated a house together and have far more in common and do more stuff together than my wife and I ever did. I also feel like we are equal, she actually earns more than I do, but everything is 50/50 joint bank accounts etc. Divorce law when no kids are involved in Australia is relatively straight forward. You take what you each had before the marriage, then subtract that from the total of what the combined is now. Take half each. Establishing that during the divorce was tough so when my current Mrs moved in I suggested we put together an assets spreadsheet together. This is far easier when you are friends. That way if it all goes south you have a starting point that is fair and was agreed upon. I have passed this advice on to everyone I know who are married or co-habiting.
Our lives are so intertwined that we say we may as well be married, I often say I am as feel too old to call her my girlfriend, so we decided we would, probably next year, small ceremony somewhere exotic.
Don't give up OP or anyone else. Ask yourself how many other decisions in your life did you get right first time? Not many I'd bet!