How do I stop???

So I was delighted when my second baby took a liking to the boob since I tried so hard and couldn’t breastfeed with my first.... but 8 months in and I can’t handle it anymore. She has become incredibly dependent on the boob and I feel as though I’m sitting around all day with my boob in her mouth. My 2 year old has really begun to get upset with all the mummy time she is getting and he is missing out on and I have had enough. I’m exhausted and don’t know how to stop the feeds.

Any suggestions???