Feeling down...

Posting anonymously because, frankly, I am very embarrassed. My husband and I have discussed to great length our plans to have children and for me to stay home with them. That is the plan we have both agreed on....multiple times. He still says that is what he wants. We have been 'trying' since January. The problem is that we pretty much never have sex. He says he finds me attractive and enjoys sex with me, but we have not had sex in a month. I have tried to initiate a couple of times, but he says he is too tired. I get that we both work and do not always have the same days off, but I feel like he has time to be on the computer or watch tv and does not make the time for me. I do not know how to fix this and it makes me feel terrible about myself. Am I being unreasonable?