I don't know how to be nice, but i can teach you how to live with yourself.
Treat others as though it's how you want them to treat you. That way you won't have any regrets. hmm.. i don't know what i am talking about.. ahhahahahah
how to be a nice girl?
always put yourself into other ppl's shoes.
understand other people's feeling,
then eventually ppl will think you're nice.
but you need to be yourself too.
otherwise ppl might think you're too fake.