I think that when Will and Vaughn first met, they didn't really like eachother. But once they kinda got to know eachother they started being nicer, sorta building a friendship. You can see that they are still uncomfortable around eachother. And WHEN something happens between Syd and Vaughn, Will will probably just be MORE uncomfortable around Vaughn and jealous. Course I think since the bar scene, I think Will got the picture that something is going on between Syd and Vaughn, well you know what I mean. So it's going good so far, but later it might fall apart.