Proverbs gives several characteristics of friends and friendships.Prov.17: 17 says, “A friend loves at all times.” Prov.18: 24 says, “There is a friend that sticks closer than a brother.” Prov.27: 6 says, “When a friend rebukes you, that rebuke can be trusted.” Prov.27: 9 says, “The pleasantness of having a friend springs from his earnest counsel.” Prov.27: 10 says, “Do not forsake your friend.” These verses bring out the fact that the Lord blesses friendship and encourages us to develop them.
"Dating" is not a relationship, it is a method people employ in our culture to get to know others of the opposite sex that was not employed in Biblical times.
The Bible does not talk about "dating," but it does talk about relationships.
Each of these three relationships have two common characteristics, a commitment to the responsibilities of that particular kind of relationship and a genuine care and concern for the other person in a particular kind of relationship.
Friendship and marriage have a third characteristic - affection and attraction, although the nature of the affection and attraction is different.
A third relationship God describes in the Bible is marriage.