i think the big thing here is about preferences and respect.
if you're really uncomfortable with the idea of him eating meat (ie, it being in his body, etc), then perhaps it won't work because you prefer something else (namely, to not be uncomfortable.
). so, perhaps it is best to let it go.
but, if it doesn't really make you uncomfortable, then at a certain point you have to respect his decisions and accept him as he is. really, acceptance is the basis for any good relationship. people are full of conflicts and contradictions and foibles. if you can accept him as he is, right now, then go for it.
some people can live with things that i cannot; i can live with things that others cannot. it's ok. figure out what you want, what you can live with, what makes you comfortable, and go from there.
(btw, my husband eats meat and it's not a problem for me).