I have never shared this with anyone, not even my parents, but when I was about 8 years-old my best friend and other of our friends started picking on me, calling me names and telling that I wasn't worth being friends with anymore.  It really hurt and I couldn't understand why they were being so mean because we had been friends for a long time.  After that day I became cautious of people and have not had any really close friends since.  I am 27 years-old now and that day has stayed with.  It has made really hard for me to make friends and keep them because I am afraid that the same thing will happen.  It doesn't just happen to young kinds either.  A couple of years ago the only friend I was somewhat close to told her parents lies about me.  We aren't really friends anymore.  I may be an adult now but it still hurts now just as much as it hurt when I was little.