I had not seen her since the semester before this last one. So the last time I saw her was may. Then I emailed her asking if we could stay in touch and she said to stop by her office when I had the chance. The next semester (this past one), I never saw her once. I thought for sure I would see her around campus and be able to strike up conversation, but it just never happened. I ended up sending her that email to drop by but she just never responded. I did actually see her, but saw that she was talking to someone else, so just had no choice but to walk right by her and pretend not to notice her. Also, at that point I had sent her the email to which she hadn't replied, so I wouldn't even know what to say. Pretty crummy feeling. And that on top of her probably thinking I'm a creep. I mean, it is pretty easy after all to just ignore students. You just... don't reply. That's great your teacher still emails you though. That should make it easier to get over them rather than never having contact.