How do you live a normal suburban, 9 to 5, average joe or jane lifestyle, doing the same job for many decades?

That's the kind of life my parents currently live. I am currently a college student who just completed my freshman year at college, with my current majors being Political Science and English. The reason I ask this question is because I am having a difficult time coming to terms with a normal, repetitive lifestyle, I really don't want to spend the next forty to fifty years of my life working at some corporation, law firm or school. My nightmare is living in a modest 3 bedroom house in the sub burbs of some random city like little rock or des monies with 2.5 kids, a family dog, a minivan and waking up everyday to go to work for some jerk who wants to throw seminars on synergy and time management. Granted all that is better than working for $7.50 an hour at some fast food restaurant. All I know is my parents are miserable, my neighbors are miserable, the women standing on the sidelines at soccer games are miserable, the intoxicated guys at the lake house down the road from me every night are miserable, and this is the types of people I have lived around my entire life. Really I have come to the realization that life is being born, going to public school and being accepted until 8th grade upon which you either are liked or revered for the next 6 years before attending college to receive a degree in something that even if you like the subject, is signing a proverbial contract specifying what task you will perform for the next 50 years before you retire, and wait to die, and that's it, which leads me to wonder why I exist, and for that matter why do any of us actually exist. I mean I don't really enjoy life, and no one I know has fun they simply have days that are better than some. And since college ended for me 2 weeks ago and I left my friends and returned home for the summer this is all I have been thinking about. I try to distract my self by writing the code for a website I decided to build. Any advice as to how I can be okay with all this would be helpful. Really it's just because I am thinking about dropping my English major and switching to Psychology with a minor in either Computer Science or Physics.