Hey B.. To start, I have never gone through anything like that, but I can empathize with you and friends who are going through that. My husband and I did go to a retreat where we learned how men and women see through different colored lenses. Women need love (Closeness - you want to be face to face, Openess- you think that maybe he is 'secretly' mad at you when he isn't, Understanding- you want empathy, Peacemaking- you need reassurance that he loves you, Loyalty- complete commitment, and Esteem- honored and respected above all else). That seems like a no brainer. Well, to men, they feel to respect what we feel to love. They need respect! Do you respect his desire to work and achieve? Do you respect that he wants to protect and provide for you? Do you respect that he wants to lead and make desicions for his family? Do you respect that he needs a shoulder to shoulder friendship (to hang out in the garage or the tv room and not talk/just watch him). Do you respect that he desires to be intimate with YOU!!!
If you do, tell him! If you use the words respect, it will blow his MIND! Tried and proven by me! Those are ways that you can show how you love him. Not sitting and talking face to face, not second guessing his desicions, not taking over things, not shooting his dreams down, telling him you want him to come home early or to help out at home more (I am guilty of all of these - and when I started respecting him, he started WANTING to hang out and talk with me, asking for my opinion on desicions, wanting to come home from work early to spend time and help out). He isn't saying that he doesn't love you, he is saying that he doesn't feel respected.
Hope this helps.