I am going through a similar situation. If someone tells you he or she is not ready for a serious relationship or that he or she doesn't know if they want that, listen! Do not guess that with time they will change or that it really means something else. It means what they said. She told you upfront that she wasn't exclusive. So from there you take your chances. You can date and see if it looks like she just needed to go slow-- but that mean you also must go slow. Before sex, you have to re-examine the situation and find out if she is still not ready/ interested in something serious. Best to wait to have sex when you are actually a couple and you have told her you would like to be exclusive and she agrees. otherwise, anything goes. She doesn't seem like commitment material. But she said that upfront. I am dating a guy who told me the same thing. But then told me to give him time. so i have been dating him and we have not even kissed because I am not going to do anything with him until I sense that he is ready for a relationship. Now I believe I have wasted time and he doesn't seem like he will ever really be a serious guy (at least not with me). I should have listened to him when he first told me that an exclusive relationship wasn't one of his goals. let him call me later when he is ready, if ever. why get sucked into someone who just doesn't know?