Caravans were showing up, but after few years the outpost liaison stopped coming...
Generally this means he died somewhere. But there should be a new one eventually.
You can't be at war with your civ, and from what you said later in this thread, you aren't. When you select your own civ and it shows "WAR" with goblins, that means that the selected civ (you) is at war with goblins. If you select goblins, they're at war with you, too.
I would recommend just continuing on without the liason, though that will limit your nobility, since he's the one that sets up baron/count/duke promotions. But you can still attract the king/queen someday, even without him!
Also if you already have the king/queen, then you don't get liasons anymore.