I might be missing something but his appointments all sound reasonable. He might be a chatty sort or trying to make you feel more comfortable by explaining his expertise. He might have said "we'll hang out again" meaning he expects he will see you again sometimes and you guys can pick up on chatting. It's very possible this doctor did not share your feelings and is just very extroverted and likes to brag. You being attractive probably intrigued him if he's not gay but he might not have been obsessing about you as you were him. Your obsession with him is not healthy but not entirely uncommon either. I've had several female friends tell me of their own obsessions outside of marriage to feel it's an uncommon phenomenon. Still I think it best to drop the fantasy and do your best not to contact him unless it's a medical emergency. You can even tell your regular OBGYN that do to no fault of his own, he triggered you and you would prefer referrals to another doctor if possible. I'm glad your results were negative and hope you continue to have a happy and healthy life with your loving family. If you were happy without him before, you will be again given time.