"If he did this it would have been nice to have been told!"
Communication is a big part of it. We all think we are the best communicators ever. Lets take this approach with this for right now. I don't see any notice of D or him moving out or wanting you to move out. So your "homework" would be to try and find the moments when he is "talking" to you. Right now the best thing you could do for you is just try and observe the "stitch". Try and look at things with a new "eye".
You need to be clear with what you want from all this. That does not mean saying anything. A big part of this is removing yourself from the "Emotion" of it and making choices because you believe it to be the right thing for you.
Mach1 had some solid advice.. and I agree.
Most of what you read about here in "Newbies" is generally a fight for "Control". They want to leave you want them to stay. So things usually go downhill quick. If you can understand that giving them some "Control" of their life and the choices they are making is not a bad thing.. things will become more clear. Hence "Act as if"...
If you "act as if" none of this bothers you... or you "act as if" you are happy all the time.. It can throw them off because you have stopped re-acting in a manner they are accustomed to. So long story short you take back some "Control" by giving some away.
"LL - for him words of affirmation will be my focus. For me quality time. What do you mean by centering the conversation? Please give me suggestions!"
Most of the time you can get something from someone by "feeding" them. In the aspect of the LL if you give words of affirmation you may receive quality time. You can test your theory on what his LL is by acting upon it. If you say "Hey thanks for dinner it was great!" and you get a positive response then you could expand on that and see how many positive responses you can generate. If you "see" a consistent theme then maybe you throw in.. "Hey dinner was great.. wanna pop some popcorn and watch a movie?" Best thing I can say is break things down into their simplistic form and think from there.
Relax Eat Think Act normal React.. Smartly. Do something different. Emulate. Do Work.
