Past, Love, Promises

Past, history that mistakes, hurt, memories, love and life back then are called.
Love, trust, forgiveness, connection, understanding and relationship.
Promises, no breaking, keeping, remembering, believing and a past that may have love to always keep.

Past, Love and Promises are some things that Scarllette and Harry have.
They've been friends since they where little, they may have 5 years of age gap but no one could break them apart. And they stayed that way for years, had the best friend forever relationship and kept promises. But what would happen if one of them just suddenly drifted away, left, have new friends and almost break they're promise?