Oh Dear my heart is with you ,It's not easy to love someone and she/he dosen't love you.
She's lucky that you love her but she's honest and told you that she loves you as her brother.
I Don't want to tell you try it again with her because true love comes once and if she doesn't love you now she will not love you later.
Try to accept her as a friend only ,and if you cannot stop thinking about her then try to forget her.
Try to make yourself busy with something you like,for example ,sports, music, drawing ....depends on your hobby.
I guess joining EC is the best solution
you're gonna find lots of friend her and believe me you're gonna enjoy it.
I wish you all the best and who knows may be there is another lucky lady is waiting for your true love.