Others have the right idea, don't go out guns blazing. You'll end of killing a fuckin' crow just hovering by minding it's own business. If you don't get the metaphor that's fine, I wasn't really trying.
Really, you are risking a lot here, a very good friendship. Cause simple truth is, even true friendships are hard to keep after a rejection like that. So it comes down to this very important question:
What do you value more, being able to be around her and chat with her… or being with her with the opportunity of plowing that booty? Mind, your "relationship" doesn't have to be sexual in nature, I was just trying to balance it out. <<
All in all, you need to take it slow, and I realize that's easier said then done. But you've got to be careful, just try and get an understanding if she feels the same way. Does she act different with you than other guys she hangs out with? If she doesn't hang out with other guys, then I say that's a big chance right there.
Simply ask her out, but not as a date, and go from there.
-Explain The Metaphor, Please
-"plowing that booty" That Line Just Made My Day
-I Dont Think She Acts Different But It's A Possibility
-Will I Really Fuck Up My Relationship If I Tell Her