Feeling a bit behind

I'm gradually starting to feel incredibly behind, and a little impatient!
My partners sister is engaged to a guy she's only known for 3 months and they've moved out together plus they have a dog. They are renting, whereas my partner and I can but within the next year, but i'm so ready for my independence, and I want to be able to actually live the life i want to!
Staying at home, caring for the house/property and eventually looking after my kids!
At 21 though that's not something i'm going to do immediately though obviously. But, while i'm waiting for my dream to come true i'm watching people around me travel excessively which, how the FUCK are they affording to do that, or they're in uni and living their best life with their friends!
I've tried uni, even doing something in i'm passionate about, animals for example, i just CAN'T do the theory/written work. No matter what I do shit just goes in one ear and out the other and than all of a sudden i'm weeks behind my work! so yes, i dropped out of uni and highschool!

I'm a cleaner; and i LOVE it, but when i come home i want to be in my own space and home. i'm so fucking frustrated with where i'm at right now...
I feel like i'm going insane being in this house with these people and listening to other people basically flourishing. the thing i look forward to is grocery shopping.
i'm not even EATING the shit i buy, i starve myself so i can feel something since my partner took my blades. i need to feel and be free.