Eddie
Yeah, you got me figured out; I'm peeking at you in the showers every chance I get.
Come on, Eddie, let's get real, shall we? I've squeezed past you in tight spaces. Doesn't take a geometrical genius to figure out which size we're dealing with there.
I'm not being a smart-arse. I'm serious here. You're friends, and friends talk, there's a mutual trust and attachment. But if you're going to look at is as a failed mission from the get-go, why even bother? Why not just give up straight away, Owl her to let her know that you're leaving. Or actually, don't Owl her and just ignore her. I'm sure that'll get the message through.
Do YOU want something more? Do YOU think she's worth trying not to be such a fuck-up with her? If the answer is yes, then talk to her. She might say she wants that too, which... GREAT! WONDERFUL!! AMAZING!!! If she says no, well, then you'll have spared yourself a couple of weeks of anguish and hand-wringing.