I wouldn't try to force him into or anything, or pressure him. Its fine to talk about stuff in the news, but I personally think its a bit much to ask people not to eat things in front of you. People tell me food I eat looks gross, but Imma still eat it in front of them. :P
My bf eats lots of meat - unhealthy at that, mostly fast food or restaurant style food every single day.
When I get my apt in a week I will be making lots of vegan food and he said he'll eat it which is a start. And if we ever lived together I know he would be mostly a vegan, because I would be the one cooking, and I wouldn't cook meat. Only time where that would differ is if we went out to eat. I would never ask him to change the way he eats though. I want him to eat healthier so he doesn't have health problems, but its his life.