The Buddha, according to the Pali Canon, is not against eating meat ,even for monks. The scriptures mentioned that he rejected Devadatta’s suggestion to ban meat from the monks diet. On the other hand, the Buddha did ban eating meat that was "seen, heard or suspected" to have been killed specifically for the benefit of monks. Lay people can also adopt this as guideline.
In the Lankavatara Sutra, the Buddha lists several reasons for not eating meat:
1. Present-day animals may have been one's kin in the past.
2. One's own parents and relatives may in a future life be born as an animal.
3. There is no logic in exempting the meat of some animals on customary grounds while not exempting all meat.
4. Meat is impure as it is always contaminated by body wastes.
5. The prospect of being killed spreads terror amongst animals.
6. All meat is nothing other than decaying flesh .
7. Meat eating makes the consumer to be cruel and sensual.
Above are the popular pro vege views. There are also the opposing vege views citing that in our interdependent eco world , eating vegetables also entails the sacrifice of many insects and animals albeit smaller ones. Another argument is that there is no causal link between eating meat to fill one’s stomach and negative result of killing as the factor of intention is absent. When we eat meat, our intention is to eat and the object is not a living thing. If its about indirect killing, then the same argument will hold for vegetarians because farmers will have to kill many insects and pests when ploughing their fields, spraying weed killers , pesticides etc in order for us to have our vegetables. It seems whatever arguments for and against apply to both sides. After all there is no perfection in samsara.
I guess the choice is still ours to make. It is not about simply not to eat meat or go vege .It should be a conscientious decision.