Definition of being nerdy and being cool?

I find it great to be nerdy! I find it great to be a bit serious! I find it great to be a bit quiet sometimes! I find it great to be a book wurm :D! I find it great that I love working! I find it great to laugh out loud at my own bad jokes! And all other things I am and do, I find all those great too. And I am also a person who has troubles, and those troubles are great too ;). If I wasn't all those things, if I did not have all those things, I wasn't the person I am today. And that does not mean I am not social, or don't like taking care of myself. I would like to redefine the word "Nerd" haha :)! I highly love gaining knowledge, but as much do I love a new dress, a good pair of heels or to dance and so much more. I love my specs and I also love my contacts (when I do wear them ;) ). It is a good mix between femininity and nerdiness and I'd rather be a woman who likes discussions and showing intelligence than one who doesn't. And I also like being the woman who sometimes is just bit quiet and smiles. So what defines being cool? And belonging to the crowd? Why I write this: people always have an opinion on others and while I usually think, who cares what others think, some points I also felt: "hmm, would they be right? Is this not cool and should I be cool?" Whatever cool meant then. This is part of what I noted down somewhere earlier added with few new lines. Just wanted to share. Being yourself is cool!