What is be the first thing every people should have they are wanna make a relationship with best friend is Love and the Second is trust.
We need love because theres no reason to loving. It just happened automatically because you are best friend.
We need Trust because its support factor in keep relationship of friendship. If theres something problem just ask and tell.
Dont listen bad thing about your bestfriend before you look it by your own.
Keep your love to your bestfriend and stay loyal.