At first Pam was with Roy. Then Jim had a crush on her. Then Jim dated Katie, and Pam got jealous. Then Roy and Pam set a wedding date, and Jim broke up with Katie. Then Jim told Pam he liked her and she rejected him twice, choosing to stay with Roy. Then Jim moved and Pam broke up with Roy. Now Jim came back, but is dating Karen, and Pam is sad.
It's only Season 3. Someone get me off of this roller coaster. I blame Pam for this.