Make sure the boys are around for moral support, even if you will most likely not talk about your feeling.
Write some (potentially chessy, and maybe not very good) emo poetry.
Focus on your unrequited love and affection on your ever-loyal pet dog/cat or whatever pet you have.
Video games. If she hurt you, you’ll still have an extra life.
CRY. Yup most likely when you’re alone. As anyone who has never experienced heartbreak knows, it’s impossible not to shed some tears after someone stomps your feelings, no matter how much of a macho man you are. After all, the heart is a muscle too, and it needs a good workout every now and then.