I really agree with the other posters about taking affirmative action to save your marriage.
What I sense is fear, on your part, of putting yourself and your emotions on the line. I can absolutely understand this because you risk being kicked in the face by telling her how you feel.
You did say that she was distant and unresponsive when you were upset and emotional. So, be calm. Be sure that this is what you want and tell her that you have been waiting for the right time to tell her this. Be clear and strong and really listen to what she has to say in return. But, state your case!
If she stays, I think that you would both really benefit from speaking with an objective third party such as counselor.
Good luck.
