What the hell do you mean 'give her a general idea of what kind of you you you are through how I compose myself'?
why are you getting defensive
when you talk to people that you don't know well you leave an impression on them: they get an idea of what kind of person you are based on how you present yourself, what kind of things you say, how you say it, how you react to things they say, etc. people are more comfortable around other people who they actually know-- having some stranger just walk up and straight ask u out or even worse "will you be my girlfriend" is awkward if not creepy whether or not they have a crush on you or whatever
it's all practically common sense so wtf u mean "what do you mean"
reading the other posts i just found out you're 11 so i suggest u reconsider bisjacs idea. seems age appropriate