Insecurity:

The definition of insecurity is: uncertainty or anxiety about oneself; lack of confidence.

That is one of the many things that teenagers face everyday, down to the simplest things as a guy getting up the courage to talk to a girl or a girl getting up the courage to talk to a guy.  Courage is something that can hurt ones life or help ones life, insecurity is the same way.  You can be insecure about loosing your boyfriend/girlfriend so in return you do everything in your power to keep them, but the catch is for it to work is they have to feel the same way and be the same way.  People think that insecurity is an ugly thing and something that is bad but even insecurity has beauty to it too.  The beauty in it is how you have so many fears and problems "insecurities" and you know that you do and you can accept them you can face them and make them known, you recognize them, you work on them, and you fight them daily.  You make people feel wanted, you make people feel loved, you make people know that you can't go a day without them.  Insecurity among the many problems people have with themselves has beauty along with many wonders if you can get over it.  It's not going to be easy but with the right person you can do it, and when you do things will go far, fast, and good for you.