Answer:
A young man wants to have me but when he has me he no longer wants me. Blade in hand he attacks me and does his best to remove me. Yet he knows that it is all in vain.
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
I am a delicious way of representing data.
I am a mini solar powered computer.
I am a time for gathering crops. Remove the first three letters and I become an object you can wear.
Give it food and it will live, give it water and it will die.