Depressed and lonely

I just really need to vent real quick. 

For the past few months he has not been showing any love or intimacy towards me. We see each other for a few hours at the end of the day, and I try to show him love and affection and he just doesn't return it or give any attention to the love I'm trying to show him. We don't have sex. We don't kiss, cuddle, or hug. Nothing. It just feels like we're roommates now. And it's just making me so terribly depressed. I cry every single night now. I understand that he's tired, but I still don't think it's an excuse to not show your wife any love. He tells me that he works hard everyday and that should be enough. But it's just not. I've tried talking to him about it and nothing works. I've CRIED to him and told him how I feel. I am just so sad and my heart is hurting. I know this isn't healthy for the baby, but I just can't help the way that I feel. What do I do :( at this point I just want to give up on life.