I've just finished the series and I have no idea what just happened.

here's what basically went on: Miyuki broke up with Souhei (MIYUKI proposed it, Souhei asked why, but they broke up etc). Later, when Miku says, "I heard you broke up, it's all my fault" Souhei says "yeah, it was" "...kidding." straight face
Souhei begins to ignore Miku at school, but he later apologizes when he's about to move out.
Then later, a week after he moved out of the house, Miku invites him to dinner. Souhei then says "i don't want to go back there ... I just wanted to see you" with tears in his eyes, and then they DO go back, groceries in hand, with happy-ending faces.

Is anyone as confused as I was about this? Especially Souhei's attitude?

I wish our profiles had a description section.