I even created a new esp, created a random npc, and tried to set a relationship.. I can get to the drop down menus, I can give it a name, but when i hit okay, nothing is set in the relationships list. Has this happened to anyone before?

Type in your ID into the Object window and click ALL, it should be in the search list.

Okay I have the same problem, is it even possible to set relationships? The new relationship is in the relationships list, but theres no way to get it into my NPC. Adding a new one in the NPC's relationship window creates it, but it doesn't add it, the window stays blank. You cannot drag relationships into the window. The edit option does nothing.