I will preface this with saying I'm a high earner, financially marriage will make me worse off. So please don't pile on with that advice.
DP and I have a 2 year old DD. Been together 9 years. Happy. Everyone at some point in the last few years has asked me why we're not getting married.
The real honest truth is, I know myself. The whole wedding dress shopping, event organizing, will cause me a ton of anxiety and stress and add a ton to my workload. I WILL 100% feel the pressure to get it perfect. We have big families, even if we stick to the closest relatives and friends we'd have 50 people to invite. I know my family, even if I try to do something casual, they will pressure me to add things here and there until it turns into a big event. The thought of organizing a shitty white wedding gives me hives. I just don't want to turn into some bridezilla and have 100 people look at me and judge my hair, dress etc.
I think part of why it's such a big deal is we do have money, I love fashion and hair etc, I'm a very stereotypical girly girl (although typing this makes me nauseous 🤣). I've just spent a weekend wedding dress shopping with a friend and we'll be the only ones from mine and DH's friendships groups who are not married after this wedding. Some have married and divorced by now too 🤣 because of my friends getting married, this question has come up a lot lately and people think I'm mad when I say I don't want to deal with the stress?
DP has said he would like to get married but he's not massively bothered. Legally or religiously, marriage means nothing to me so I can't be arsed with an elopement.