I'd just like to add that trusting another person to fiddle with your hair,
especially first thing in the morning, is a subtle sign of trust. If they were actively dating in the "matchmaking" sense, most girls would not want their beau to see them first thing in the morning; makeup or not, everyone looks half-dead first thing after waking up.
The helping-with-morning-routines implies they're approaching
marriage engagement dating from the "cohabiting besties" angles.
tl;dr: "The prideful/tsun female yankee will only allows a male to groom her if the male is her pair-bonded chosen mate; such intimate grooming proves they are nesting together."