When I was in college, I was able to discipline myself from eating meat. I managed to stay vegetarian for almost two years or so. What changed the course? I got pregnant. My doctor prescribed that I should eat meat because it's a good source of protein. So I did.
It's actually difficult not to eat meat in the Philippines. There are only a handful of restaurants that offer veggie meals. Worse, there are very few suppliers of veggie meat. And the only meat that I'd rather eat more than pork and beef is chicken meat served fried.