I feel like my parents don't have any expectations for me anymore

I don't know whether to feel happy or sad.
They seem to only chastise me out of necessity, merely so that i won't turn out a complete failure and end up dead in a gutter.
They no longer hold grand illusions of me making something of myself, but will be content as long as i have the means to put bread on my own table.
I feel like they've placed all the hopes and aspirations they've had for me onto my brother now.
I overheard them talking about sending my brother to a private school in the later stages of his highschool years.
"It better work. Wouldn't want to spend such a ridiculous amount of money and have him turn out even worse than his older brother", they murmured.
It makes me want to shout: don't give up on me yet! I'll show you all! I can still make something of myself!
But what good will it do? My grades, my behaviour, they all speak for themselves.
What happened to the bright, motivated, hardworking third form child that had such amazing aspirations to save the planet?
What happened to the intelligent, accelerated fourth former who had his whole future ahead of him?
Now i can't even bother putting my cans in the recycling bin.
What happened?
Have i been led astray?
Am i having a mid-life crisis way before my time?
I so desperately want to rekindle that spark, reignite the desire to achieve, to succeed, and to take out of life as much as i can so that i can give even more back.
I am wasting my potential, and i honestly and wholeheartedly believe in that.
But i feel as if im missing a key ingredient.
Missing someone.
Will i be able to walk this journey alone and still emerge victorious at the other end.
And if so, at what cost to my soul?
I guess only time will tell.