Quote from Ross in The One with the Flashback
Ross: I have to go. Carol should be home by now, so. Chandler: How's it going with you guys? Ross: Better, actually. You know, I think I finally figured out why we're having so much trouble. Phoebe: Oh, really? Ross: Yeah. You know how I have you guys? She doesn't have any close friends that are just hers. But last week, she met this woman at the gym, "Susan" something. And they really hit it off, and I think it's gonna make a difference.