It sounds like you have a lot to start learning. "His needs, her needs" is a good place to start. I was in your situation several months ago, moved out and now seem to be headed toward a D -- despite the fact that I've learned a lot about the things I was doing wrong.
Me: 47, Ds 17-13, D final 6-11 http://tinyurl.com/yk4e2tz http://tiny.cc/thread2 http://tinyurl.com/ydtphqu http://tinyurl.com/thread4 http://tinyurl.com/3sm78k6 http://tinyurl.com/thread6