depressed, upset, play loud music, listen to papa roach, evenescence, paramore, (anything that has to do with dieing, bleeding) bullet for my valentine, watch movies with blood and gore and death....
yes, anyone can be. emo is not a style emo is simply short for the term EMOTIONAL anybody can be emo you don't just have to be into heavy metal bands etc to be emo that's just very stereotypical.