(Here's a short little article I wrote about being a vegetarian):
Let's face it, life as a vegetarian can be an every day struggle. It takes knowledge, planning, and conviction. Even more so when you are the sole vegetarian in the family! After all, what do you cook for dinner when one loves tofu and the other loves chicken? It's true that it may be easier to just eat out, or to have a "fend for yourself" attitude about meal times, but we all know how important it is to eat dinner together as a family. So what can you do to bridge the gap between the herbivores and carnivores?
For starters, have a frank conversation with your family and explain why you have decided to become a vegetarian. If they understand your reasons, they will be more likely to support you in your decision. Along with that, try to resist the urge to criticize your family members for eating meat. You may feel very strongly about your vegetarian diet, but if you expect them to support your decision, than you must be prepared to support theirs. If it's something you are passionate about, by all means speak up, but be calm and respectful in the way that you do it, and do so away from the dinner table. No one likes to hear about animal cruelty while they are eating their dinner!
Lastly, when preparing meals, look for recipes that allow for meat to be left out or added in. Casseroles, Stir-Fry, and soups are all great examples of meals that you can make half vegetarian and half with meat. Spend time together preparing the meal and have fun eating it afterwards.
It may take some effort, but rest assure, you can be successful as the sole vegetarian in your family!