The thing is ... no matter what you eat, there will be animal life lost.
A field of wheat is not a sterile dead zone, neither is an orchard or a humble vegetable garden. Rabbits and field mice get caught by combine harvesters or crushed under tractor wheels, insects are killed by washing methods or insecticides -- you can't really get away from it.
My response to this issue was to only buy grass-fed meat and eat nose to tail (I boil up bones and render drip and the suchlike), and to source my veg well and not waste anything (so I boil peelings for stock and compost waste). Where we are, grass-fed is not really that much more expensive and you do eat less of it because the nutritional value is so much higher -- plus we don't eat lean meat so the higher fat content keeps us going for longer.
We chose this way because, to me, supporting grass-fed means supporting meadowland, which is supporting spaces that teem with life and are vital for the ecology of the land. Bees are just as important as cows, even more so when you consider their vital role in pollination.
I also think if you are going to eat meat, you should respect the animal by trying to use as much of the carcass as you can ... though, tbh, I can't quite cope with sweetbreads. 
Interestingly, to give you an idea of how we cannot get away from food and death, I once read a fascinating article about the first Indian vegetarian migrants to Britain in the 1950s. While these migrants had been fine in India, many of them starting suffering from acute anemia in Britain and no-one could figure out why.
It turned out eventually that the main cause was the way veg and fruit was washed before sale in Britain. The British way removed all traces of insects or insect residue from the veg and fruit whereas, back in India, fruit and veg still had little insects and residue on it. It was the consumption of those tiny insects and residue on Indian fruit and veg that had prevented those India vegetarians from developing acute anemia.