My son just turned 3yo and still nurses, although mostly just before bed and occasionally just before a nap. At nine months he was really enjoying trying food, but as Turquesa said I felt like he was nursing as much, if not more than before solids. And I also agree with the teeth coming in part. He nursed like crazy when a new tooth was coming through.
Our nursing relationship waxed and waned through the months and years. Sometimes I felt so fed up with being "on" all of the time. Eventually, probably about 18mos, when I thought he would understand, I introduced the idea of a 'break'. I can't remember the story I told, or how I related it... but in a way that would make sense to him... like, 'When you have been playing in the sandbox all morning and you start to get tired and a bit hungry, then it's time to take a break from playing in the sandbox.' Well, the boobs need a break sometimes too. They get tired from working hard all of the time, because when you aren't nursing they are still busy making milk for the next time you nurse. So, that made nursing sweet again for a time.
Then, just when I thought that I couldn't take it anymore (about 2yo)... DS fell off a step and bumped his head and scraped up his face (trying to be a big kid before he was big enough ). Well, he ran to my arms and asked to nurse, crying and bleeding and all. And so we nursed and he quieted and I was able to be there for him in a way that was so good for both of us! Those moments erased all of the 'sick and tired of it' that had been building.
When he was about 2 1/2yo and I was a couple of months pregnant, nursing started to give me the 'all-overs'. I wanted him to self wean, but again, I couldn't do it anymore. But I couldn't figure out how to wean when my heart wasn't in it and he clearly didn't want to. Then, a couple of months later, we lost the baby. I felt so blessed to still have a nursling, my sweet sweet 2 1/2yo son. He would crawl into my lap and snuggle and nurse while I was still recovering. I was SO thankful that I never quite figured out how to wean him!
So, I don't know if these stories will terrify you or give you inspiration to plug on through... But for me it has been well worth the worst of times. All that I have received from our nursing relationship far outweighs those hard times, though it is hard to see that during the hard times. Whatever you decide will be the right decision for you and your family.
**As an added note... My friend used to pump so that she could get time off from nursing. Her DH could watch the LO and she could have several nurse free hours. That really worked for her and her family. Oh, and her DS didn't eat ANYTHING until well after his first year.