How to wean my 15 month old?

je

My son is still breastfeeding I planned to stop at 12months but he was teething and didn’t want to. Now I am pregnant with baby #2. He literally spits out cows milk, I even get organic whole milk for him.. I’ve tried different temperatures too and he just doesn’t like it! I don’t know what to do this is definitely messing with his sleep too😣

*i give him milk everyday with almost every meal/snack and he doesn’t drink much at all*