Just that. Someone taken a very obvious dislike to you and sees you and turns their nose away in a very exaggerated way. What do you do? Ignore, smile and wave, talk to them, carry on?
There is huge back story but it's long and not really needed, I don't think I have done anything (think it's a case of guilt Conscience) but I'm not sure I want to salvage anything, but I'm guessing other people have experience of someone disliking them and just wonder what you would do?