Friendship =)

Friendship could happen by itself. Its not a force. Within friendship, theres a lot of values that we will found..
For example,

-the tendency to desire what is best for the other
-sympathy and empathy
-honesty ;)

-mutual understanding and compassion
-trust in one another ;)
-Positive reciprocity, which is a relationship is based on equal give and take between the two parties

hope with this information, your frienship will last forever and always. ;)