"Okay. That's fine. I don't like parties. I really don't like parties where I don't know half the people there, and the other half the people are people from the office that I don't spend any time with willingly anyway. You can meet them some other time. If you want to, I mean. I'm not trying to force you to meet anyone. Do you still want to..."

How does he phrase this without sounding needy? If Ned doesn't like parties, and doesn't like Halloween, then by all means, he shouldn't be forced to do anything. On the other hand, he'd like to see Ned, and is completely aware of his own desire to spend time with Ned, even though that may not be what Ned wants right now. All he can do is make the proposition, offer several alternatives, and hope like hell that Ned still wants to see him in some form or another. It's better not to sound desperate, and, remarkably, he manages to keep any desperation out of his voice as he speaks up again.

"Do you still want to do something? Not a party something. Just... something else. Something low key."