fell in love with a boy on facebook?

[How]

i am a male. i wanted a girlfriend for myself. no girl added me on facebook. no girl accept my friend request .so i created fake account in the name of girl and girls started adding me as friend. I find one girl cute profile and started talking as a girl. she think that i am a girl. i started liking her and chatting her every night. i fell in love with her but afraid to tell her truth that i am a boy.
one day she asked me " do you like me as a person"?
I said "yes"
she asked " are you telling me this not to break my heart"
I said "No, you are best person in the world"
She asked "do you love me'?
i said "yes"
She asked " Would you still love me if I tell you i am a boy"?
I got confused and ask her what she mean.
She said that she is a boy and want to make friendship with girls and added me to be friend and fall in love with me.
i disconnect the chat and not logging in the account.
why this happened with me?