How to stop breastfeeding?

Hi everyone My son is now 18 months and I feel like I am ready to completely stop breastfeeding. But it’s been really hard especially at nights cos my son safe co sleeps with me and whenever he wakes at night he wants to breastfeed or just suck on boobies for comfort. My supply is low now so that’s not the problem. It’s just how to get him off or start disliking sucking my nipples. I feel like I really want my body all back to myself now and enjoy a drink 🥃 here and there but it’s been challenging trying to get him off my boobies. I really enjoyed my breastfeeding time but from last couple of months I have been struggling as I feel like it’s affecting me physically and mentally.. physically because it drains my energy and mentally I have been feeling like I’m ready to let it go now.. my plan was to stop at 1 year but then I had tough time letting it go cos my son really wanted it plus I always wanted to continue but now I’m really done and need help ..pls give suggestions. Is there anything I can apply on my nipples ?