Breastfeeding and SO's

Okay ladies I need your help. I was talking to my SO about breastfeeding and I brought up the fact that if we're out somewhere and babe needs to eat, I'm going to feed him/her. He got pissed and said I wasn't allowed to breastfeed in public and if I did he was going to leave me. I calmly explained to him that I would be covered up and nobody would see my breasts. He then called me disgusting and when I got upset and called him disgusting he said I was one of the most unintelligent people he's ever met and that my views shouldn't matter. Has anyone else's SO acted like this? If so, how did you guys change his mind? I'm so hurt right now. I feel like he thinks it's just an excuse to "whip my boobs out anytime I want" (he's said that before as well) I just want to know if you were able to change their minds. Thanks everyone 😞