Ok, my thoughts. It's obvious that they aren't as close and that's because of several reasons...
1. They were close all the way up until January when Vika became #1 after winning a slam and validated the ranking. She did what the Pusher couldn't do in about 2 years, in 2 weeks!
This put the strain on their friendship and we can see that on Twitter. Whereas the Pusher likes to congratulate Serena on Twitter for some of her slam wins and most recently the Olympics, she never even acknowledges Vika's success. She's dead silent. And we all know why,
Also, they used to tweet each other all the time and now they barely even talk on there.
2. I think another big factor is the feud between Vika & Aga. That put the Pusher in the middle and although she might not have intended to, she kind of sided with Aga. Now guys, this is just deduction on my part. I have no access to their private conversations but it makes no sense that the Pusher is still so tight with Aga and at the same time not as close with Vika. Then again, Aga didn't win a slam,
3. Her relationship with Rory. As Jimmie mentioned, when some girls get a boyfriend they change and ditch their friends until the guy breaks up with them and they come running back. Sooooooo, I guess we'll just have to see what happens. Rory has shown he has no problems ditching his girlfriend and moving on to the new girl with 15 minutes of fame. The Pusher's on about 20 mins right now so he should be revealing his true self soon,