Really upsett and need to tell my friendd

im really upset with my best friend. to make a long story short, she set up one of her friends with the guy that i like knowing that i really liked him. they hooked up at a party we were all at. and my best friend is the one who initiated it and told them go hook up. i had to over hear her tell them. we found out from another time that he only likes me as a friend, but still it was just wrong of her to do. my best friend's friend even knew that i liked him because ive hung out with her with my best friend 2 times before . i really want to tell my best friend how i feel but i feel like a b. i.t .c. h doing it because i usually dont get mad. everything is so messed up now because i cant hang out with them with a smile on my face acting like nothing happened. i never say how i feel and this time i dont want to let it go. im so torn because i honestly cant trust her that much. even before this ive always known how she was. but at the same time i cant stop beng friends with her. how do u think i should handle thiss??