My H was doing the same thing - right after S would go to bed he would leave. Tonight he actually stayed longer but was very distant. He kept following me around like he wanted to say something to me but couldn't get the words out. It was very awkward - a lot of silence.
As far as goals, from the beginning I set GAL goals for myself. Do you have any hobbies, do you do anything for yourself? Some of my other goals were to detach, not initiate contact, be pleasant around H, not bring up R talks. When your H is over with D, maybe you can go out for a walk, go to the library for a while, go visit a mall, etc. He doesn't always need to know where you're going. Be a little mysterious at times. Also, do things with your daughter, take her places and casually mention it to H when you talk. This way H will see you're becoming more independent.
Me47 H46 S13 M16 Piecing since May/09
"Life is 10% what happens to us and 90% how we react to it." Lou Holtz