As they say, comparison is the thief of joy. I was also brought up to remember that there will always be those better off than me and there will always be those worse off than me.
As others have said, you have a mortgage, this means that one day you will own your home, you won't be paying rent and you're not at the whim of a landlord. You should also be paying into a pension, so when you eventually retire, you will be better off than someone with no private pension too.
By working, you're also more likely to increase your wages at some point. Both you and your partner can work towards promotions and pay rises. These are all things that are long term plans and one day should see you in a pretty good position.
If you really want to genuinely improve your circumstances, start a new thread, post your budget and ask for ideas to reduce costs. Even if you can find $50 month, start investing, this is also something that will pay off long term.
If you post your budget and ask for ideas, you will get advice you would never use, but you might also get one or two tips that are easy to implement and would suit your circumstances.
My tip would be, go back to doing your own nails. They can still look good, but be a whole lot cheaper. For me, it would take one hell of a lot for me to give up my every 7 week hair appointment. See, we are all different.