How do I permanently stop breastfeeding if I’m not producing as much?

My son is now 1 year & 1 month, I been exclusively breastfeeding since birth but I keep getting mastitis & now I’m not producing like I used to. He’s always crying for my boob and I don’t know what to do, I’m just not producing like I used to.

He knows how to drink from a bottle & sippy cup. And eats baby food, even tries to eat my food lol. How should I do this? He still wants my boob when it’s nap time & when it’s time to go to sleep but I won’t be able to do that often now so I don’t know how I would even get him to fall asleep without my boob😩

I’m so stuck, I don’t know how I should go about it.

Is almond milk an alternative for breast milk?