OP, I am a meat eater who has been married to a non-meat eater for 15 years. My first husband was a vegetarian and my son has become a vegetarian for the last 5 years as well. In all I have been a meat eater living with non meat-eaters /vegetarians for over 30 years.
I do find it quite annoying sometimes. In particular I had a rebellion about quorn about 1 year ago. DH loves the stuff so we did eat it reasonably often for a long time but ,quite frankly apart from one or two of the products, I was starting to really really dislike it (never liked it much to be fair) and the mince is pretty rank (to me anyway) so have stopped using it as much
I do appreciate that it means my meat consumption is much much lower than it would be otherwise which is a good thing but vegetarian food really is more work to make and prepare, it just is.
Left to myself I would live on tinned mackerel, grilled chicken, grilled fish and the odd steak/lamb dish all with veg and salad done in different ways. I might eat the odd casserole, chilli and pasta dish but would definitely eat more simple marinaded grilled meat as it is easier to get a tasty meal without too much effort. BUT I understand and respect the food choices of my family and try to accommodate them
What I would do if I was you would be to mainly cook vegetarian when you can
So I do a cannelloni dish stuffed with ricotta, spinach and vegge parmesan substitute and some breadcrumbs t. This is instead of lasagne which is actually quicker to make and I prefer than a vegetarian lasagne.
Pea risotto is also popular here but I do put real parmesan on mine which make it much nicer i.m.o
I would make burgers and wedges but use substitute veggie burgers for the veggie
Fajitas, use quorn for the veggie, you just need to fry in two pans, one chicken/meat, one quorn
Pasta - stick to vegetable sauces if possible- easier to do than trying to mix. I have fantastic lentil and walnut ragu that is not too bad at all and even I like it .
Cottage pie -try lentils instead of meat. I am generally not keen on shepherds/cottage pie and find the lentil ones really really bland ( and I have tried about 20 different recipes) but they are edible and DS/DH like them so we do have that.
Bean chillis are popular with DS and DH, though quite frankly I loathe them as they just always taste of beans to me, but I make and eat tham as it is a healthy meal and your family may like them.
Try some of the veggie options, some might be liked