If your parents are in the financial position that you’d feel ok about asking them for help, then presumably they’ve managed their money well.
can’t you ask them how they budget?
I do think you’re living beyond your means. But you’ll feel far more comfortable if you tackle this now and create a plan.
Holidays are far more enjoyable when you know you’ve been putting aside a chunk each month which covers the cost (including accommodation, travel, passports, new clothes, travel insurance, ice cream spends etc). the years you don’t need to renew your passports are the years you can maybe go a bit more luxury. The same goes for all other categories.
for example, I put £50 into my grooming ‘pot’ each month. I don’t spend it most months, but it’s a good feeling when I can splash out on a mani pedi, wax, facial etc.
and my house maintenance pot grows each month so I can easily pay for repairs, new mugs, curtain dry cleaning etc.
i don’t worry about my teen DD going to university because we’ve saved to help cover her costs. If she doesn’t go to uni then there’s a good amount waiting to help with a wedding or house deposit.
honestly, once you’re in the swing of budgeting, it’s easy and gives so much peace of mind.