Usually if friendship blossoms between two persons of opposite sex they share all the emotions of life for some time and they know the SWOT of a person that is the persons Strenghts, weaknesses, etc and there is trust, love, sharing all the feelings and a friend is always there through thick & thin and such a bonding if leads to Marriage there is lot of fun, understanding in marriage, I married my best friend i always feel iam the most luckiest girl on this earth my friend gives the best to me always.