Hiya!
This is neha... and I'm 11 yrs old... Well... actually a few of my friends think that I'm diplomatic and I honestly don't know in what way... I tried asking one of them because she is always true to me and has been my best frineds since I was 9 yrs old...

On asking her... she said that I become diplomatic when I want things.. and I really don't know what things and like how... I tried asking her this as well... but she just won't answer me...
HELP!!

Any kind of advise would be appreciated... have a nice day!

It sounds like they mean that you are kind and considerate in how you present what you want... that is, not sounding mean or too authoritative.
Another word for it would be tactful:
"skilled in dealing with sensitive matters or people; tactful".

Yea... may be... but who knows... anywayz... thankz a lot.. :D