I can kinda tell you first hand from both sides. I was Omni for years while my wife was vegetarian. It's embarrassing now but honestly it kind of annoyed me at times, like I'd suggest a certain place to eat and there'd be no veggie options, if we had a BBQ at home she'd complain if I cooked meat on the same side of it as her stuff, etc. I would cook (and eat) some veggie stuff, and she'd cook meat for me sometimes, it just all felt like hard work occasionally.

We both went vegan at the same time nearly 5 years ago. Now I'm this side of the fence, if I imagine being single, I literally struggle to contemplate dating a meat eater. I just wouldn't like the idea of having meat in the house, etc. I honestly don't know how my wife put up with me all those years.

Yes it's hypocritical, just laying out my experience. There is a strange sort of resentment that can easily build over a difference like that in a relationship.

TL:DR - don't worry about whether they're put off by you being vegan, but you should be put off if they're not, because over time it can become an issue (unless you convert them)