well simply remember that this person is human being, they have two arms and two legs like you, i hope. build up some confidence, and don't be scared of rejection, theres over 5.billion people in the world, if this person doesnt like you, then that's there loss. you know your a good person. try again, and who knows you may find some luck.
you tell someone you like them by your body language.
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Tell someone that you like Emily for example. Then tell the someone why you like Emily, and get out so it's not bottled up inside you. This worked for me when I was afraid to tell the person I liked them.
tell your feelings to her/his friend and let her/him tell to the one you like!
how you tell someone you like them is just to be your self around them and ask and see if you can tell them something and Say it
hhh
if they are rude to you
you ask them out.
No you can not
Just tell him that you like him better as a friend.
Bang em and see if they like it
Write to him, Simple!!