What is with this guy ?!?

He keeps asking because he hopes you will. Good for you for standing up for yourself! Just because you had a good chat once doesn't make you a couple. A guy that really likes you for who you are will NEVER pressure you to do anything you are not ready for. You are very young and just learning how f'd up guys can be. Stick to your guns because the second you give in, that will be the moment he loses interest. Good luck.