So ... I haven't read all of the comments, but I have seen a few very judgemental ones. Please be reassured that you are not causing a problem nor are you halting their independence. They will wean when they are ready and usually this is between two years and four years, but can be up until they are six or seven.
I recently had another baby and I tried to tandem feed but couldn't get on with it, it was just horrible. My eldest was boob obsessed until only a month or two ago, and he is going to be four soon. My second Abby helped me put the boundaries in place that I needed to in order to wean my eldest.
My recommendations for stopping night feeding without too much crying (I tried to go too fast with the morning wake and feed to sleep so I did have some tantrums, but I did then slow down)
Anyways..my recommendation ..is wear a t-shirt / clothing that they can't find their way into in the night and then don't get your boob out for them. Also talk to them, tell them that they are too old for boob in night now and that you all need more sleep, and that they can still have boob at (when ever you feed them) but that is it. It will take a while, it takes three days to break a habit.
If those don't work or you don't want to start on that straight away, say you can have it for two mins (what ever time feels comfortable for you and your child) and then shorten the time they are allowed... To get mine off the go to sleep feed I used to count to ten and then sped it up...but mine didn't like me counting out loud, so i would just make it go faster every night in my head until eventually he stopped asking.
The more you discuss with them in the day that they don't have it at night now as they are bigger etc ..the more they will start to connect the dots.
I did also move mine into his room as I said that he would have more space in his bed if he slept in there and he'd feel less tired etc.
I also used a sticker chart and rewards system for him when he stayed in his bed all night.
Also ...while he was in his bed..I stopped offering him boob and he would ask for cereal/cup of milk at all random times of the night..this went on for a while, but did eventually naturally stop.
I learned...that no matter what you do, if you put boundaries in place they will understand and you'll be surprised how resilient they are. There may be the inevitable tantrum but offering the right support and comfort they will get there and understand.
I thought I was going to be able to follow baby lead weaning and allow him to give it up when he wanted, but it just wasn't for me, but then I didn't try hard enough with my own boundaires around breast feeding.
I also used a lot of chocolate, biscuits, crackers and bananas to help wean him, both in the evening and in the morning.
Sorry it's long, I hope it helps. I have been struggling and know how it feels. (I doubt I'll be as relaxed about it the second time round though)