I just had a girl, that I don't know super well, rant to me about her sex life and near break-up with her boyfriend. I've only known her for a few months and we've only spent time together outside of classes once. I'm already pretty awkward in social situations, so when things like this happen I don't have a clue what to do! I feel like it would be rude to tell someone that you don't want to hear their stories, so is it better to just sit through the discomfort? How do people deal with things like this!

ETA: FWIW I'm most definitely an under-sharer. Unless something is really important I'm kind of uncomfortable talking about myself. Maybe this is just something I need to get more comfortable with?