Sleep with a few of them, then ignore the rest. Send late night text messages that read: "I like hanging out with you the best." When in their company, speak in your own language. Get drunk and lament how no one understands you. Cry often. Cry all the time. When they offer you a shoulder, act as if it's a crime. Push them away. Tell them you just want to be left alone. Don't reply to their invites. Don't answer your phone. Unless you're in a crowd, then stay glued to that thing. If they play your favorite song, do not sing. If they buy you a drink, don't buy them one back. If they give you advice, then go on the attack. It's easy to lose all of your friends once you've become a sociopath.