You are not alone! I have felt the same drastic change since my second child was born (now 8 months old).
While it probably wouldn't hurt to talk to your ob-gyn about possible reasons/referrals, here are the things I think about/work on:
1. Don't make it a self-fulfilling prophecy. When you think about being intimate with your husband, try to imagine and remember the enjoyment of it -- even if that means you have to think back to before you were pregnant. Work on stirring those feelings. If you talk about it with someone, don't sound negative about it.
2. Do those little romantic things you used to do. Leave him little notes. Make a special dinner. Maybe spruce up before he comes home from work. This will do two things. It will put *you* back in the mindset of being 'romantic', and it will also (hopefully!) help him to also start making little extra efforts that will make you feel more loved.
3. Remember that this is an important expression of love for most men. I know I personally could survive on our family time and a little one-on-one talking/entertainment (ie playing a game, seeing a movie). BUT I *know* my husband both expresses and "receives" love to/from me most powerfully through love-making. It's just the way he's wired. The other thing I've read (my husband has never said this in so many words, but I do believe it's true) is that when they feel like WE are satisfied with their love-making, it gives them confidence in the rest of their life (ie work).
In other words, even if you have little or no interest in it, as long as it doesn't physically hurt (an issue I am actually still dealing with, believe it or not) I would really make an effort to meet your husband half-way. Try to up your "day time romance" to help stimulate what's left of your libido (I know it's hard!), and consider it an important expression of love to the man who you are sharing your life with.
I hope this makes sense. I do truly and deeply understand what you're going through because I am too. (My baby is still nursing and still in our bedroom (and our bed most nights as well!).) Also, talk with your husband (not when he's 'in the mood!') to explain what you're struggling with, but that you still love and respect him and hope that it will get better with some effort.
Good luck!
T.