Would you be able to do it?

For those of us who have guns, if someone broke into your house would you be able to kill them? My dad just bought me a glock after I got my permit to concealed carry. He was telling me not to be afraid to protect myself but I was just thinking I would have it to scare people. I don't ever intend on shooting it. If someone tries to rape me or break into my house, I'll just aim it at them and try to look intimidating. Hopefully they don't call me on my bluff. If you have a gun, would you be able to live with yourself if you killed someone in self defense? Would you do it? 

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