I used to think about people...put a lot of time into thinking about this certain other person...and what I found is the amount of time was so great, that for those three years I didn't grow as a person because all my time was simply spent thinking of this other person...it was during my adolesence and when I went away to college I was numb and had no clue who I was...so in my opinion take a close look at the amount of time these thoughts can take up and I personally see too much tought as DANGEROUS.