My family is not supportive of my vegetarianism. What can I do to keep me motivated?

I live with my father and brother, who are both very big meat eaters. They always make meat based dishes for dinner and even though they KNOW I dislike meat and have been avoiding meat for quite a while now, they still ignore this and make meat, which I cannot eat. Since we only really have staple foods in the house, I either end up eating nothing or having something not very tasteful. Any motivation I once had is now rapidly fading, what can I do?