Priorities and Confusion

I wonder sometimes, if 10 years down the line, If I come across this post or a diary entry of mine, and read it, will I even remember the people whom I feel so passionately about now as though they were the centre of my existence? It doesn't seem too probable. How many things that bother me to no end, which keep me het up and frustated to days at end, will eventually really matter in my life? What am I doing now, or what should I/shouldn't I be doing that will eventually matter in my life? How much of the things that really matter in my life are really in my hands? What does one mean whan they say that something is in their hands or not?