I'm working through something similar as well. I'm finding out that even while we feel we are blending well, there's still some unresolved or residued issues that maybe the other parts don't want to hear, so they in turn give me the silent treatment. I'm also finding out that saying what needs to be said internally whether anyone is listening or not seems to help me feel better as a person. I guess it's kind of like a reasoning skill.
Andy may just be afraid of the unknown or doesn't understand what is happening. Open, internal, communication is very important I believe. Just let them all know what's going on and how you feel about it even if there is no reply. That's what has helped me calm my own anxieties and lows. It's good to hear you're healing. Hope I've made a little sense that may help.