Well when your friends on benefits with more disposable income than you right now reach 68, they'll get £10,800 per annum. You will get that and an occupational pension.
You also have e the satisfaction of knowing that you are independent and probably put in as much or more than you take out. That's something to be proud of.
You are also instilling into your children a good work ethic.
We are very comfortable, and probably moderately wealthy. If I look up I see people with several houses, yachts and private jets. Good luck to them I say.
Can you be thankful for the things you have: healthy children, a comfortable home, happiness. Even the things around you: a blue sky, a blooming rose, the soft warmth of a loving cat, a spritz of perfume?
I buried a little baby in 1997. People see my beautiful home, reasonable clothes, lovely grown up DC, sometimes have a pop at my career and the hours I work (I like work - it fills a void made in 1997), I can't actually think of what to spend my salary on because there's nothing I want or need.
Be glad for what you have op - even the shit bits - which we all deal with.
And FFS get yourself some nice shower gel and spend 6 minutes having a shower, feeling the jets of hot water around you and let some of the days stress put down the plughole.