Welcome to basenotes, if you stick around long enough you will learn so much. I am 19 and a college student so I see where you are coming from.
For the scents that you want to wear in the cold mornings and warm afternoons. I suggest Obsession by Calvin Klein or Chanel Allure. As for parties I suggest Magnetism for Men by Escada. I don't really have a scent for dates or summer scents. Review those frags and let us know what you think.