In our marriage we have NEVER lived within our means until last year.
Of course, when you have 2 full time university students with a baby/toddler/child, paying for uni without help from family... that almost goes without saying. Add in preschool tuition, and sheesh. If we had ever lost our funding for any reason... we would have been screwed.
The only reason we live within our means now, is that DH graduated... and I took a hiatus from school so that we could buy a house. We chose to be house-poor on purpose (we live much better being house poor than we did paying 3 tuitions). Still... we very much are "gap bridgers". All of our parent friends are well off. Not wealthy... but their educations are complete (aka they're saving for their kids' educations - instead of their own, they have homes that don't need anything "done" to them, they can take vacations, etc. All of our school friends are 50-200,000 in debt... living the weird student thing (2k laptop while eating ramen). Our parent friends don't understand that we haven't painted the bathroom because we have to budget the $30 for the durn can of paint... and our school friends don't understand why we haven't done a total remodel... because DH makes "so much money".
Neither group understands why we live the way that we do. (Yes we tore out a wall a year ago and haven't rebuilt it. We needed to get the mattress upstairs. Demo costs nothing. Rebuilding, however does.) Both groups have about 100x more clothes than I do... but I'd rather spend the money on season passes up the mountians... or piano lessons for kiddo than to buy new clothes. (Hey, I'm not naked... I'm good). My mum periodically gets horrified at seeing the SAME shirt AGAIN (and having learned I won't take her up on shopping trips) gives me giftcards to clothing stores on xmas's and bdays.
So why bring this up? We're happy. We're happy for ourselves, and we're happy for our friends. It's harder with family. My inlaws consider us Richy Rich, my family considers us dead broke. But WE are happy. We don't have what everyone else does, and we have tons more than some of those same people. ((AKA I have a free phone, and 2 pairs of jeans... because I'll use that 500 to take kiddo to london for a long weekend instead. Every time I see an uber-slick phone, that will be outdated next week, I get a little happy "The Bristish Museum ROCKS" or "I <3 Snowboarding" kind of grin)).
Now perhaps I feel this way because I've had a job that paid more money than gawd (we're talking so much money it wasn't real, it was like monopoly money), and I've been homeless. Living on both extremes, makes the middle a pretty durn cool place. I can have and do WHATEVER I want... I just have to save for it (we don't have credit cards)... AND I get to be warm and dry and have a down pillow whist I save for it.
It sounds like you are NOT happy. So what fixes that? Since it can't be anything outside of yourself (aka nothing but no one can make another person change)... what would need to change to make you happy with your own situ? Something material? Experiential? Mental? Physical? What would need to change in your own life, so that other people's lives aren't painful to watch?