Well, it is clearly your choice. I have a few friends that became vegetarians just for health reasons, nothing to do with loving animals.
I personally love meat and would never give it up. In the wild, there are some animals that eat others. It's nature. I don't want to be messing with nature.

But, at the same time, you don't see bunnies eating meat so there has to be a few that decide not to.
If you do become one, make sure you still get plenty of protein from beans and nuts and I think most vegetarians will still eat eggs (as they are unfertilized, so you're not harming baby chickens at all). You can still get your calcium from cheese, etc.
Expect to lose weight. My friends lost a lot, which tempted me, but I still love meat! I suggest taking a multivitamin daily if you do it (I take one anyway).
Vegans won't eat anything that comes from an animal, including milk or cheese or eggs, so you'd really need to eat nuts and beans, take vitamins, and probably calcium. I don't know why they don't, something to do with "it hurts the animal," but really it doesn't hurt them to use their milk or eggs.
It's really up to you and your views. Make sure you know why you're doing it and are safe if you follow through.