Oh no, I am awful at this. My standard pieces of advice are “Get over yourself” and “Oh god don’t ask me that.”
I can only speak from personal experience, and that involved a lot of whiskey. Now, I’m not telling you to use alcohol to solve your problems… but I’m not telling you not to, either. Just know it doesn’t always make things easier… even though in our case, it kind of did.
Honestly, the best I can tell you is to talk it out with her. Tell her exactly what you said here- that you like her, but don’t want to lose her as a friend. Understand and respect that she may not feel the same way- don’t punish her for not liking you, but don’t feel like you need to stick around if it’s uncomfortable for you, either. Things may get a little weird even if she does feel the same way- your friendship will most definitely change, so be prepared to deal with that. If she does feel the same way, well then, relax and enjoy the ride. Things are about to get so good!