life changing

The title is lyrics from a song that I used to always listen to, like a couple years ago. I am still trying to figure out what exactly the lyrics could mean, but to me they are saying that having a fear of loving a person can change you and sometimes it might be for the worst. I sometimes feel like after being hurt once it is kinda always in the back of my head that it could happen again.

When I entered my first high school class in 2004, I was absolutely certain that I was going to major in zoology.  Shortly afterward, this dream that had preoccupied me for so long was totally forgotten.  This class changed my perspective, my priorities, and my expectations of the future.  It is a very common class, considered an easy ‘A’ by some, or a pleasant diversion-but it became my pa