You've pretty much described me under slightly different circumstances and no I don't think you're mentally ill, I think you sound very normal. Life doesn't have to be constricting and boring, that a choice eventually, but you're right life is easier with money than without and so far you're doing all the right things to get that, doing well at school etc, so carry on. Life's a trade off all the time, there is no such thing as a free lunch, and if you want nice things, a good standard of living, whatever else, there are prices to pay, and at the moment it's being bored witless by people you don't really gel with. It'll pass, just don't do anything ludicrous to try to break the monotony, just surf it and before you know it you'll be 20 wondering where the last five years went and in a much better place to do what you really want. I'm pretty sure you're not mentally ill- well if you are I probably am as well and I just think I'm a normal, easily irritated 20 year old who wants as much as she can have and overthinks things sometimes. That's all the glories of human nature. Just chill, you're fine.