I understand the feel, I've had people who were friends admit they have a crush on me and I've just felt awkward as heck afterwards and feel like I can't act normal around them anymore. However, we're all adults now so my method for that situation is to front it out, the weirdness always goes away eventually.
Tbh I think if dropping huge massive obvious hints Beauts style doesn't work for you but you really like the person, it's worth telling them. If you're not sure, do it in a slightly joking way to see how they react first. If it's just a fleeting crush and you're more concerned about not losing their friendship then sometimes it's best to say nothing at all as it'll probably pass, but if not I think telling them, though hard, is worth it. You can do that in many ways, write them a note, a message, tell them face to face, whatever is more comfortable for both of you. But as I say, try to figure out whether the crush is worth going out on a limb for versus friendship.