I've been veggie for 30 years or more, now. No-one else in my family was then and no one else in my own family is now. I have 5 meat eating kids and a meat eating husband and we manage fine.
Most of the meals we eat are veggie and when they aren't, I just make something simple like a jacket potato for me.
I cook a lot with lentils and beans. For instance, you could try making chilli using green lentils or a mixture of pinto and kidney beans, instead of mince. Because of all the other ingredients and flavours, folk don't really notice that there is no meat. Another good one is spinach and potato curry, again so many flavours that no-one minds having no meat.
Being veggie doesn't mean that you spend the rest of your life eating nothing but plates of veg, there are lots of things that you can make that everyone can enjoy.
You could make risotto of some kind, polenta or pasta in a nice sauce and add a few pieces of crispy bacon to it after you have served out your portion, if you really wanted to.
Patatas bravas, add some chorizo after taking yours out, make lentil loaf or nut loaf instead of meatloaf, bean burgers instead of beefburgers.
You could make individual quiches, some with ham, some without. Savoury rice, add cooked meat after taking your bit away.
Cook lentils and rice in stock with tex mex spices and use to fill tacos, instead of mince.
Tofu fingers are a nice change from fish fingers or whatever, especially if you use smoked or flavoured tofu. You can use tofu in stirfry instead of meat.
Homemade soup made with veg stock gets eaten just the same, just don't add any meat to the pan.
To be honest, mine get what I cook and are expected to eat it or go hungry. They don't get meat very often or in large quantities because I can't afford it. No-one in here ever gets a steak or a chop, for example, and certainly no salmon fillets or tuna steaks, because they don't go far enough. Meat and fish are luxuries in here, so the children value and appreciate them more when they do get them but are quite happy when they don't. SO I can't really advise on this one very well. If you are looking for something to replace the odd steak, you can buy ready made nut burgers or quorn fillets, if you want to go that route, or you could make a stuffed portobello mushroom quite easily.
It is no problem being the only veggie in the house, you just have to rule with an iron hand