I think you're just overestimating what we mean when we say "Oh, that's going to be hard." I'm not much of a cryer either- I did cry at my grandpa's funeral, but more because I was mad at my family than that I was sad.
Maybe by labeling yourself "unemotional" you've sold the emotions you have short? I mean, you're going to miss E. You're going to feel sad to leave her and your family and go back to work. Nobody thinks you should curl up and die, but missing people and being sad are emotions too 
And I don't think the nervousness about your dad is at all misplaced. He has spent a long time destroying the trust a child innately has in her parents. But, apparently his GF is OK, so I'm sure it will be fine
Have fun!
Commenting by HaloScan
