I am in the exact same boat you are in with a wife I love very much and all I feel like doing is telling her how bad I feel, crying on her shoulder, etc. I have found that I can also go a different route and express love and gratitude to her. Sometimes I just thank her for being there, and I try to do nice things for her whenever I can. I even wrote her a letter telling her what she means to me, bascially all the things I feel about her but never say. It might also be good to find other things to talk to her about, even though you might not feel like it, you still would be sharing moments with the one you love.
I also totally get the pushing friends away, seems like all the self help books tell you to keep in touch, stay connected, hang out with your friends. I'm not sure that's always right, I've tried it and sometimes it's good other times not so good. I hopefully will be out of hell before too long and I can reconnect then.