re: Things I should know for the future?

I'm only 3 years older than you, but assuming you are a junior/senior in college this is my advice

You may have a ton of friends now but remember only a small number will remain your true friends after college. That doesn't mean you will hate everyone else, but the natural progression of life will drift you apart.
If you move to a new city after graduation be prepared to go outside your comfort zone, join clubs, go to things you wouldn't normally go to, join your local alumni association and start meeting people. It's a lot harder to meet like minded people in the real world than in college