Ok so after going through some of the event logs to see if I had missed something I noticed that even though I had finished the Northcrest Conspiracy there was one box that wasn't ticked for "Wander around the Northcrest Markets at night", though I'm sure I had done that before, I triggered the event and agreed to keep Everett's secret which made him like me and he showed up in the Relations menu, just thought I'd mention this if someone else encounters this issue too.