Don't Sit Here

When you know you're going to run into someone you need to avoid you make plans to ensure it won't be awkward... but what if you're on a plane and you realise the girl that WAS your best friend until you deserted her to try and hook up with her sister is about to sit next to you?
Will this plane ride be a chance for young love to reconcile, or is this really going to be the most awkward thing in the sky.