I used to think I could never become a vegetarian. I love meat, too, and agree it is part of the food chain.
However, I felt at some stage that I couldn't talk about the welfare of animals and expect things to change if I wasn't living my convictions. I became vegetarian after doing a lot of research, and a lot of study. It wasn't a hard decision, in the end, because the more I learned about how animals are exploited to feed us, the less I felt like eating meat. So in the end I didn't have to make the choice, I just couldn't physically eat it anymore after what I had learned.
Also, I believe in myself and my own strength and I believe that I can be unselfish in this regard. Sure, I like meat, but it doesn't really impact on my life that much, and if it means doing the right thing, I can do without it. To me, it's simple. It's not that simple for everyone and that's fine.
I am also vegetarian for environmental reasons but that's a whole other thread!!
My number one motivation for being vegetarian, though, is ethical. I believe that it is human nature to eat meat, and I believe it helps round out your diet and provides you with nutrients that are harder to obtain elsewhere. But it doesn't have to be intensively farmed meat, or battery-hen chicken. After two years of hard core vegetarianism, I am somewhat more relaxed now.
I eat meat, but I only eat meat that has been ethically raised and butchered. Free range, organic chicken and beef. I never, ever eat lamb, because I cannot bring myself to eat baby animals, and I never, ever eat pork. Because there is still very little headway being made in the way pigs are raised and out of all farm animals, they are treated the absolute worst. They live lives of abject misery for the most part and I cannot and will not be a part of funding that industry. I can do without pork and lamb, easily. And if I miss it, too bad. That's life and I can deal with it. I rarely, if ever, eat red meat anyway. I just don't miss it.
The same goes for fish and seafood. I won't eat any farmed seafood and I know where the fish I buy comes from. I try to operate on the principal as much as I can that if I think I would be able to kill it myself, I will eat it. I couldn't kill a lamb, pig or cow, so I don't eat that meat.
Sure, it makes life a little less convenient, but I'm not lazy about these things and I feel that if ethical considerations are to be meaningful, a little inconvenience is something I can happily live with. Plus, the satisfaction I get from knowing that I have not helped contribute the misery of an animal is much stronger than the satisfaction I get from eating meat. You just have to think of others instead of yourself and see the bigger picture. It's not hard to make ethical choices.
I don't use any products at all, where I possibly can, that are tested on animals either. Again, it's a bit more inconvenient but I don't want my mascara to be on my face because of the suffering of a poor creature in a lab.
So yes, we have every right to be human, and eat meat, but we have no right at all to be inhumane, and eat meat raised in cruelty and suffering. I hope that answers in part some of the questions here regarding vegetarianism.