I nursed each of my boys until well over 2. I loved it! My boys sound much like yours about the breast-worshiping thing! When we finally decided to wean, we did it gradually, starting with the breastfeeding during the day and moving on from there. The night weaning part, though, was NOT fun! First, I had talks with each of them during the daytime for a while, telling them that the milk was almost all gone now...that since he was a big boy now, he could drink milk from a big boy cup, and he didn't need Mama's milk any more, because that's only for babies. That logic helped lay the foundation. When it was time to cut out night weaning, I told them that the milk was now all gone, and that if they woke up in the night, we would cuddle, he could have some water, etc., but that the milk was all gone. Then when he would wake up, I would remind him of the talk... But in reality, when your sleeping boy wakes up and is used to nursing, reminding him that it is no longer an option can be tough. The first son, when I reminded him, started wailing and wailing and cried himself back to sleep. If he woke up in the night after that first night, my husband or I would hold him for a while, but as soon as he remembered the situation, he would sadly climb back in bed and refuse to let us comfort him. It was so sad! During the day he was perfectly fine, though, and the nighttime sadness quickly went away.
Our youngest son was a different story. He was a little negotiator and would try everything to keep nursing at night for quite a long time after I weaned him. He was also sad about it, but not as deeply as his brother was. After he got used to the new arrangement, which took a good week or 2, at least, he was fine. Definitely the hardest part of weaning for us! Our youngest has not nursed for about 3 years (he's now 5), and he STILL talks about it lovingly and longingly ("Mama, do you remember when I used to drink milk from your breasts...I liked that...")
Best wishes. Enjoy that wonderful closeness while you can!
C.