Friends do many things to show affection to each other such as kissing on cheeks, forehead or hugging or other type of non sexual physical contact. As far as kissing on lips is to be considered, it shows a form of intimacy but if you two are comfortable with it then it is completely ok.

Do best friends hold hands?

Holding Hands Is a Sign of Friendship Around the World Friends and family in many cultures hold hands for no other reason than to feel comfortable with one another. It may seem trivial, but it gives people the sensation they need to feel their best with the support of their friends.