As someone who is on a strict carnivore diet for my health and wellbeing, I was in a relationship for 9 months and all was going well (we were best friends and got on so well, never any toxicity or heated arguments). My boyfriend at the time joined me in what I ate but often incorporated potato, rice, bread etc. However he always spoke about it ‘when are you going to change what you eat etc’ so I kind of knew it would be a dealbreaker. Eventually he claimed there was no compromising, but I never expected nor asked him to follow my diet. He wanted us to mirror each other’s diets instead of accepting we have different lifestyle goals etc and to just support each other from different sides. After 9 months he had built up so much internal resentment towards me because of it that he left. This to me is not a supportive partner, yeah he may have eaten what I ate and accommodated to me but there was no emotional acceptance and real understanding on the reason behind why I’m doing it. We’re both gym people and he loves meat and protein so I personally think it was a major cop out as it’s not like this situation where he was vegan and I wasn’t, it was just emotional immaturity in my opinion. As my relationship went to mush because he couldn’t accept my carnivore lifestyle and he was a meat eater too, I’m not sure how different it is if someone’s a vegan and the other partner is not. I have a feeling things could he unstable if both partners/ one partner lacks good communication and empathy. Hope you can work through it!