My son has been refusing my breast milk all day so I tried formula and he preferred that and it…

My son has been refusing my breast milk all day so I tried formula and he preferred that and it makes me mad because my sons dad said that’s what they give him over at his house when he runs out of breast milk and I told him why didn’t he call me to bring more if that’s the case... I wanted to breastfeed him until atleast 8 months but now I might not be able to I’m pissed.