Most Helpful Girl
Nope, don't worry about it, I'm 4'11, and dated a guy who was 6'7. It looked awkward sure, but who cares? we liked each other, thats what mattered.
As for sex, I actually asked a question about the height difference, and apparently it'd only make it more fun, because the taller guy can do things to the "short" female that can't otherwise be done, one example was lifting her up