Just do it, you'll regret it if you don't.
Good-luck, I hope it goes well for you. It probably will.
If you're nervous, count to three and then just do it. - We're The Millers
Literally dude just ask her how she feels about you. It's really not that hard. She'll tell you how she feels and then you'll know what to do from there. Pimpin.
Just ask her out. If you feel she has feelings for you, and you care about her, it's bound to happen. Be straight up with her, and tell her how you feel. Good luck.
You obviously don't have a brain. Considering you ask a bunch of weirdos on the internet for love advice.
OT: If she is a true friend, she won't let you asking her out ruin your friendship. Just go for it. Worst she can do is say no, and you guys keep living your friendship out.