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Most therapists would agree that the best way to work on a marriage is to be in the marriage, living together. Living apart does nothing to build the skills needed to improve communication between the two of you. It would help clarify the issues if you would consider marriage counseling together. Here's a directory of therapists: http://therapists.psychologytoday.com/rms/prof_search.php
In the meantime, both of you would benefit from reading HowTo Improve Your Marriage Without Talking About It. It explains the differences in needs between men and women in relationship, and will increase your understanding of each other as you attempt to repair your marriage.