okay so my friends ex-boyfriend likes me alot. even while they were dating..... so they broke up after a year. and hes also my exs cousin. me and the guy talk but not like that anymore. sorta. we made this plan to see what my friend would do. so me and him are "fake" dating. she seemed ok. but she told like everyone and is being a B****. i dont know if i should keep on with the plan with him. or if i should tell her i was lieing and turn the trick onto him. i like him but dont want him to hate me. and i want her to be my friend again. so what should i do??