A.P.
Shant'e
I understand how you feel. Nursing for a whole year is a very selfless thing to do. You're usually putting your child & their needs ahead of your own. Remember though, that there are SO many bennefits to you too.
Even though you feel like you need your body back,there are ways to feel less of the demand & still wean slowly, gradually & with love or to simply limit nursing sessions a bit and allow your child to wean themself.
One way to do it would be to start letting your child sleep in his own bed (IF you are ready for that! I'm all for co-sleeping when it works for everyone!). That alone cuts out much of the demand & gives you (sometimes!) a better nights sleep.
There is some great information on www.KellyMom.com and in La Leche's Womanly Art of Breastfeeding (book) on weaning with love.
Remember too that nursing beyond a year is VERY different than nursing a baby. It's usually a few times a day (if that!) for a few minutes here & there. However, even though it's still so short, your body makes up for that by substantially increasing the amount of antibodies in your milk so that even though they take in FAR less milk, they still get the full protection level.
Also, studies have shown that by nursing for 2 years, you reduce your risk of breast & other female cancers by 50% or more! And the longer you nurse, the more your risk decreases!
Ultimately, you need to do what's right for you & your family, but there are ways to both get what you need and for you to both be happy about it.
Good luck!