A true friend vs an associate

Friendship is one of the most valuable assets one can have.  The bible states in Proverbs 18:24 that "there exists a friend sticking closer than a brother". It also shares that "bad associations spoil useful habits" in 1 Corinthians 15:33.  So, what is the difference between a true friend and an associate?  Should your mate be your friend first?  Do you know how to make and keep a good friend?  If you are young should your parents have a say in who you are friends with?  Are you friends with someone for the right reasons?  Are you friend worthy?  And are your friends worth having?  Tough but real questions. Definitely worth pondering on....