All you need is to talk to that one person. You don't want anything from them but just to talk. Start over. New. Yet you feel like that person doesn't give a shit about you.
Ignore User
Both you and this user will be prevented from:
Messaging each other
Commenting on each other's stories
Dedicating stories to each other
Following and tagging each other
Note: You will still be able to view each other's stories.