I have this friend that i thought he is a gay.When i asked, he scolded me,n is very angry.Whats wrong?

Guys who aren't gay don't want to be labeled gay. Hell, there are guys who are gay who don't want to be labeled gay. And, believe it or not, there are straight guys who act very, VERY effeminate (like a girl) and have mood swings, shop til they drop, and even 'PMS'. He might be one of those. Good luck.