Hi there J.,
Well, no offense to anyone, but other than the two women towards the beginning who posted because they have been in your same position, ALL THE OTHER ADVICE HERE IS GARBAGE! I've tried it all, believe me. My husband said exactly the same things to me: still attracted, still love you, but just not interested. He couldn't explain it any more than that.
Perhaps what a lot of women don't understand is how depressing and how defeating it is to try to turn on your husband and then fail. Yes, it is possible that a man can not get turned on, and no, I am not super fat or anything of the sort. But really, get refused once or twice, and any woman will be wary to try it a third time.
Anyway, the only advice or help I have to offer is a book, called "The Sex-Starved Wife" by Michele Weiner Davis. I haven't read the whole thing yet, but it is very informative and will give you lots of explanations and steps to take.
I am sorry to say that I have just had to get used to much much less sex than I ever wanted, and this is the saddest thing about my marriage. I have been putting up with this for two years now, and yes, it sucks terribly. Our daughter is 17 months old, so I don't know how much it has to do with a "new baby" or with her at all anymore. Perhaps the tables will turn, as one woman posted earlier, or perhaps not. I don't know. I kind of got burnt out from trying to talk to him about it and then the resulting fight.
Anyway, again, I didn't mean to put anyone down earlier, but really, it's hard to understand this situation unless you're in it, and when you are in it, it's a little depressing to hear all these ideas which sound nice but really don't help that much.
Good luck to you, and if you find some magic solution, let me know!