<human>: Can you condense the text into a few key points?

Okay, I'm gonna go into a bit of detail because I really am seeking advice here...

I came to college a couple of years ago and one of my first friends was this girl.  We eventually settled into becoming very good friends.  She's my best female friend and I'm her best male friend.  

I eventually found a girlfriend in college, and well, that didn't work out, but a lot of our fights were related to this friendship.  This girl and I have never ever been inappropriate with each other, but over the years I feel like she's always subconsciously came to me for support and stuff like that, and that she's very comfortable being herself around me.  

Anyways, one weekend last semester, we got drunk and after months of debating whether or not to hint at a possible relationship, I finally decided to act upon my thoughts.  It was dark, we were on separate couches trying to fall asleep and I asked her "hey ___, you ever thought about dating?"  she very drunkenly replied with a soft "no," but for some reason I didn't believe her.  

Well a couple of nights ago we did some LSD together and if you've ever done it, you'd know how it kind of opens you up to your emotions and she got super embarrassed and giggly when somebody poked fun at her by saying she was flirting with me.

Now the problem is that, I graduate soon and live a few states away.  I have never ever pressed the issue after the one night where I "asked her out," but I really think this is the girl that my heart won't ever stop burning for, so I really don't want to miss out on spending my life with her if she's just shy or scared or something?

Can anyone offer me some advice?
<bot>: I want to ask out my best friend again because I'm still convinced about some spark that she may be hiding... what can I do without harming our friendship?