in my opinion, liking this guy again doesnt make you a bad person. he doesnt sound like a jerk. if it didnt work out between him and your friend, its probably because there was not much substance in their relationship. you mentioned she's hot. so that could've have been a big reason why he set her eyes on her instead of you. i think you should definately tell your friend how your feeling. im sure she will understand. after all, you said that you both had liked him at the beginning, and even though you didnt clarify, im guessing that she knew that you liked him too. and she still went out with him. so tell her about it. and continue hanging out with the guy and see where things lead. hope it works out.