I can't get over her, I keep thinking about her.
What about her is keeping you down?
I'm doing everything right and she still isn't talking to me. I can't take it anymore...
If you have a romantic interest that isn't reciprocated, you should not continue to pursue that person as it is creepy and obsessive. Instead of focusing on that person, it would be better to find someone else who is interested in having a relationship with you and can reciprocate your romantic feelings.
Don't lecture me just because your relationship turned out good.
I'm just trying to say that it's understandable that you are very concerned about your feelings, but don't you think no answer is an answer too? How about confronting her in person one last time to make sure, and if she doesn't like you, to finally move on and focus your energy elsewhere?