Im still fairly convinced this is a recessive pied male. Recessive pied (birds with this feather coloration) do not get the classic blue ceres or noses that other male budgies do. This bird must be one year of age at least, and if it were female, the cere would be snow white, tan or brown, never pink. Only recessive pied males have pink ceres at this age.
However, it is perfectly normal for two males to be very close friends and highly affectionate with each other. Males are not dominant in this species, and tend to form closer friendships with other boys than females are likely to with other females.