What you must understand is that your self-reflective view is not unique. Many people find themselves striving solely for one goal at a time with immense intensity. That is actually the best way to achieve your goals, is to concentrate with your entire attention. There are two reasons you may feel out of balance, one is because you feel you are missing something in your life but you dont know what and 2) you see yourself approaching life unlike those around you. So let me tell you a few Zen explanations for what you are experiencing.
For the first reason, what you are in fact missing is self-actualization, all single-minded, intellectual and able-bodied people have this natural urge. This goal is not a simple one but if you are indeed feeling this, you must pursue it. Most people spend their lives "asleep" under a veil of consciousness, memories and ego. Some of us subconscously realise this and wish to "wake up" but we dont know how. I recommend looking into Zazen Buddhism or Kabbalah for answers on how to achieve self-actuallization (and, further, enlightenment).
Regarding the second reason, understand that everyone has their own prism though which they see the world, some more contrained then others. If you find yourself thinking, acting or overall being different from your environment it is not because you are out of balance but because your "prism" (life view) is unique.
Also keep in mind that our minds are extremely powerful tools and they are capable of multi-tasking. It may seem like you are obsessing over something (and it may very well be), however note that you are also dealing with school, family, friends, car, house, taxes, religion, etc, etc. If you find yourself doing only one or two of these and neglecting the rest, that would be a dangerous sign of obsession.
In any case intense concentration is good and if you can apply it toward self-actualization all your other questions will be answered automatically.
Good luck!
Boris R.
http://www.TheLeagueNY.com