Bishop,
I would take another shot at it and ask her on a date. See if she wants to go see a movie, go to dinner, etc. You could also check out local events in your area and come up with something more creative. If you asked her to be your girlfriend 3 months ago and have not asked her on a date since then, it's possible that she may not have taken you seriously. You are going to have to talk to her to find out. Just be prepared for her answer either way. Also, if she tells you no, do your best not to let it affect your friendship. It sounds like you have been friends for to long to let hurt feelings get in the way.
Good Luck!!
Nikki
