Hi Alf, it sounds like you have done a lot of thinking about everything, and some changes you are starting to make. As far as being there for your wife to talk to, sounds like you are on the right track and are handling things better. I think it's a good idea to offer that you are there for her if she is wanting to talk about something with you. Then, if she says no, I would back off and not ask again. If it was a problem in the past that she felt she wasn't safe talking to you, then you can prove to her now that you are there for her, just don't pressure. And, as you said, just listen and be there for her.
My H is Acts of Service as well! I would say, continue to do the acts of service, whether she comments on it or not. Even if she does not comment, she will take notice and appreciate your effort.
I am in a similar situation as you, where my H has stated he no longer loves me and I think he wants to separate. We are still living together in the same house as well, and we have 3 children. Like you, I am worried about how to act around my H, and just trying to do all of the right things, as to not aggravate things. I think giving them space if they need it is so important!
Keep at it!
M: 8 yrs T:14 Twins:7 S:5 BD:'NLILWY': Feb/2013 Mar/Apr/May: MC June: "living in limbo" Sept 12: H moves out Oct 20: reconciling Jan-Feb 2014:MC Feb 2014: separating, and H moved out.