Yeah I have similar worries, I've always felt younger than I am and a bit of a failure compared to my peers. Still not married with kids like I hoped I'd be by now, I'm not super career minded but my work experience is spotty and mostly consists of cash in hand favours and bits of volunteering. Unemployed otherwise. I've lived alone since I was 21 but I know exactly what you mean about pride preventing you to ask for help with anything.
But if it's any consolation, not feeling your age is very common for all adults, not just us. Ask any old person how old they feel and they'll say 21 or something!
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MONKEY 2, 30s boogaloo