H.F.
Hi L.. I just wanted to let you know that I am pulling for you and wishing you the best.
I've been with my husband for 5 years, too, and we've gone through periods where we barely spoke. We eventually had to come to the conclusion that we love each other, want to be together forever, and are willing to do WHATEVER it takes to stay together in a loving, happy marriage. That couldn't have happened, though, without communication. Perhaps you can talk to you husband about this tonight.
I rarely ever tell people exactly what to do, especially when I don't know the person well or know both sides of the story. However, if I were you, I'd go downstairs, give him a long, heartfelt hug, and ask him what is going on. Ask him to just open up to you and tell you what's on his mind and just listen to him. Listen to him whole heartedly. After he pours his heart out, ask him if he's willing to hear your side of the story. If he is, pour your heart out. If he's not, ask him why and when he would like to hear you share your feelings with him. Now, if you do this and he doesn't respond. Tell him how you feel--that you feel like your relationship is suffering and that you want to do whatever it takes to repair your relationship. Tell him that you don't want to keep going down this road of unhappiness for you, him, and your child together.
I hope it all works out. I hope I'm not overstepping.