What should you do if your friend and younger brother are dating?
Truthfully i dont think there is much else you can do. If your
friend really likes being around your brother there isn't much you
can do to stop her. If it makes you feel uncomferatlbe when they
are together around you ask them to leave all affection,(hugging,
kissing, pet names) away from you. Most of all if they are happy
together it is your duty as a friend and a sibling to support them
and feel happy for them.