Wait
don't act like you like him !!
Look for a new friend that can KEEP SECRETS
if there is a chance of your friend being with their crush back off if there is not or only a small chance or their crush likes you then tell your friend i told my best friend she was fine with it i mean its only a crush its not like they are actually dating
You do nothing. From what I gather from your question he must have thought you liked him or had a crush on him, so he was trying not to hurt you. The message here was "I like you as a friend, but nothing more". He feels differently about your best friend so he dates her. You are in the "friend zone".
Well it look like you and your crush are over - sorry.
If your best friend doesn't know you like your crush than tell her how you feel about it. what you can also do is tell your friend that you liked him first or tell him to decide between you two. or you can also share him. or you or your friend can move on.
treat it like a joke and laugh along get him to lke u hth
You must make a decision on who you like more, and find a nice way to break it to whoever you don't like.
You don't.
well if your crush would do that he/she is not who you thought they were so you shouldn't like him/her anymore
Thank them
Tell them might be a good strat but you might want to give them signs.