My boyfriend (of seven years a few weeks ago, so long term!) is a meat eater, milk drinker and cheese addict and I'm newly vegan (was vegetarian and dairy-free for several years before that) and I have only found a slight judgement from others, but it's still there.
While I find it hard to deal with his choices (he's such a wonderful and compassionate person who cares for animals and animal rights so greatly and yet can't seem to bring those ideals together and change in his lifestyle) I know that at the end of the day, I'm not responsible for his actions and all I can do is try to educate him and open his eyes to the realities of the industries he supports. Thus far, I've got him to swap to solely consuming genuine free range meats and eggs and taking a much bigger interest in the ethics behind the foods he consumes but he still buys leather and processed shit with animal derived ingredients without a second thought ... I figure, some change is better than none and all I can do is keep trying!
It sucks and it is a big strain but as with your boyfriend, he'll eat vegetarian or vegan when we are together (which is 3-4 nights a week if not more) and goes out of his way to ask me questions and engage with the topics I'm very passionate about so to me, that's half the battle.
I think people need to realise that you can't always help who you love and if you are truly 'in love' with someone, you make compromises to stay with them, even if they are big compromises. So long as my boyfriend is happy for me to disagree with him and to lecture him about things I don't think he should be doing, I don't know what else I can really expect. Though it is such a huge part of my life and I think, such an important issue considering the way society views farming and animal rights, I don't think you can define someone's entire being or worth simply by their take on the subject. People can be good without necessarily making the correct moral choices but that's what it is to be human! Of course, I judge people who eat meat and blindly consume animal derivatives BUT it isn't my place to turn that judgment into negativity and spite, it's my job to turn it into positive information; a way to make them see WHY I disagree with them and HOW they can change it.
You should tell anyone that give's you a hard time that there are far more important things to focus on besides vegans loving non-vegans. The way you conduct yourself, the activism you take part in and the ways you inform others are what matters! Besides, who knows, maybe one day you'll be able to convince him that eating meat isn't the right thing to do. I still hold out hope for that with my boyfriend

I don't think it detracts from the legitimacy of your beliefs!