Man Gets Woman To Like Him Then Hurts Her

i met this friend named keyth...sheve been a good friend to me but sumtyms shes getting my crushes away to me..!!!all mt crushe is her crushes too..one day.. she said to me that she had sacrifice many tyhings for me and im treating her like no one..!ive tried to be agood friend but one day she took my crush away..!!she did that even though she knew that ill be hurted if shell do that..!!that day i am very sad,angry and of course dissapointed..!!i want to get revenge of her..!!she did this thing to me not just once but many times..i think shes insicure cuz watever she does..im always the top and much favorite of our teacher..,!!