Not sure what to do

[TrentC]

That's what "acting as if" is all about.

If you can keep up the appearance of being happy to be around her, and try to enjoy yourself without bringing your R up at all, then this could be a positive event.

The problem I see is that you've already pre-judged how it's going to go. You're already decided that she's not going to be comfortable, which is going to make you uncomfortable, which will make her uncomfortable.

So again -- I hope that works out for you.