Don't feel bad - you shouldn't feel forced to continue with something just because of other people. It's also not as much fun to play with someone when you know the mun isn't enjoying herself. It's quite a shame, since Souma is indeed a great character and I think you've done a superb job at playing her, but if it's what you feel most comfortable doing, it's for the best.
Now there is only the matter of what we do with certain unfinished threads. :/ Mod Almighty, would you advice us to simply pretend this thread never happened? We could otherwise assume it ended peacefully, or play it so that Souma suddenly dissappears right there and then...?