I can't really think of a reason other than I still love him, but I can't come up with any reasons why I love him.
I find this happens with me - My feelings for W will ebb and flow. Sometimes I really don't feel like I'm wanting to save the M, other than because it feels like the right thing to do. Other days, I really feel my true feelings for W.
Give it a day or two and see how you feel. It might be helpful to write stuff down when you have a good day so you can communicate it to your C if you can't get your head around it at your next appt.