If you're already kegging I think the idea of just kegging it and using a growler to carry to your friend's house is the best way to go. Calculating the amount of sugar to put into an individual bottle can be tricky. You could bottle and use carbonation tablets in them. I recently tried them and wasn't pleased with the results, though. Just pick up a couple growlers. At least if you give beer to your friend in a growler he (or she) is less likely to stupidly throw away your growler (something they often seem to do to bottles).
"So you say you just brewed your first batch of beer. Welcome to the obsession." --me, to every first time brewer I ever meet.