I love this show, too - I am a new addict myself
I think that Sarah and Joe are over, which was sad at first but I think that considering he jumped back with his ex means he wasn't good for her anyway.
I really hope Kitty and Robert get married and are HAPPY, though every episode I have this feeling that something's just going to go terribly wrong. I hope not!
I also love the character of Justin and his storyline, and I hope he comes out ok and gets help. I like his friendship with Rebecca, too - she's definitely grown on me!