Hi! I was blessed with being able to breastfeed until my son was almost 2 years old. He was VERY sensitive to what I ate. Sometimes I forgot that what I ate changed the consistency and taste of my breastmilk. Especially if it was particularly spicy. It might not will taste like a jalapeño to him, lol, but what you eat changes your milk. 

I found amazing help at an all natural supplement store and they had pull forms of the common milk supply teas to take. I could never stand the taste of the teas. I’m not sure what you have available, but amazon sells a lot of amazing products as long as you check them out well first. 

Jessica B is right. What you eat affect the taste of your milk. For example coconut make your milk taste foul. So check what your eating?.

And if he does want your breast at least pump and give home the bottle. 

Good old luck

Drink lots of porridge n eat healthy,once you eat healthy n your baby nursed no need to worry but lots of milk n healthy fruit juice will increase your milk