I often feel the same, OP. I'm married, and on a very good income. However, although my DH works as hard as he can, he earns a pittance, mainly due to health problems. He covers his own personal expenses but contributes nothing really to the family pot. I pay for all of the food, clothes for me and dd, the bills, the car, any holidays, school trips, dd's hobbies etc. Everything, basically. These days, I also do pretty much everything at home, although dh does try when he is able to.
I often feel that we're unable to have all the nice things that many of my friends and colleagues take for granted, despite my earning more than any of them. However, I think it's partly about priorities in our case, as I pay a fair amount into my pension each month and have been overpaying the mortgage since we took it out - as a result, we'll finish paying it off around twelve years earlier than planned. I'm also quite debt averse so when I bought a new car recently, I didn't take out car finance but bought what I could afford upfront. I also avoid credit card debt etc. Could it be that you're similar?
I also want a bit more money to enjoy life, so I've been reviewing things recently and I'm making small changes to try and save in painless ways - e.g. shopping in Aldi, switching energy providers, taking my lunch to work etc. I'm still learning, but I'm already finding that every little helps.