Most Helpful Guy
In my opinion it's the main thing... has a lock on his phone and doesn't want you to know the password. Obviously always on his phone and if he is really confident about letting you look on his phone then most likely he has app to hide all his texts/pictures/calls... this day and age cheating is so much more possible.
Most Helpful Girl
Long time in bathroom.
Staying up late without you.
Starts making you do shit like grocery shopping by yourself etc.