H.W.
This too shall pass. New babies are exhausting and, if you are nursing, even more exhausting physically, because making milk is work for the body.
Try to look at it this way: this has nothing to do with how attractive you are. A low libido may be your body's way of saying "boy, I do not want to get pregnant right now!"
I can't tell you how to feel about yourself, but I'll tell you what helped me. Taking walks with Kiddo in a front pack (good exercise) to just get out of the house. Eating well and making sure to get in a balanced diet of proteins, good grains and fresh fruits and vegetables. Drinking tons, and I mean tons, of water (no soda, no caffeine... so that way I could nap with my son, or at least not have my appetite suppressed or feel irritable).
Your husband is tired too. Don't take this personally. This is a huge change in one's life, and if this is baby #2 or 3, even more so. Life shifts quite a bit with baby #1, but I did find as a nanny that it was Baby #2 that made the parents look like deer caught in the headlights.
Rest, be gentle with yourself, and try to remember that this is temporary.:)