Some peoples mindset is so that they see boy & girl as bf or gf. they cant accept that boy & girl can be best frnds. even if my bro is with me and my frnd doesnt know it they will take it in other way. It all depends upon what we think about boy & a girls relationship. And girls feel sometimes awkward with boys. And if a boy behaves in proper way with a girl the hirl will act as original as she is.