Stupid McDreamy! He makes a decision and then quickly regrets it. Stupid man. Stupid stupid men. And after what that freaking Addison did to him! Poor Meredith. She better not take him back until he's been on his knees begging for so long that he gets chronic knee pain.
At least, we know that at some point, Addison has to leave 'cause she's only signed for 6 eps. She's only a bump in the Mere/Derek ship... albeit, a large ugly wife-shaped bump. I think we should have a party when she leaves. Like, a "ding dong the witch is dead/gone" party. And I hope Derek tells everyone what Addison did - so that they'll all see that Addison is really the devil and Meredith isn't exactly a homewrecker.
Y'know, the past 9 episodes, I liked Meredith but thought she was pretty "meh." Now I'm all rooting for her. As long as she doesn't become a mope. Then Cristina will have to whip her into shape.