Be someone's Sunday morning; not just Saturday night
Be someone's first message in the morning
Be someone's 4am conversations
Be someone's last goodnight
Be someone's sleepless eyes
Be someone's always answered calls
Be someone's never deleted messages
Be someone's calm
Be someone's silence
Be someone's punching bag
Be someone's shoulder to cry on
Be someone's voice of reason
Be someone's reality check
Be someone's wind beneath their wings
Be someone's first call in any situation
Be someone's default ride home after every drunk night
Be someone's default '+1'
Be someone's safety blanket
Be someone's shooting star
Be someone's smile on a bad day
Be someone's aadat
Be someone's always available
Be someone's happy ending
PS: Be someone's mastercard ;)