Does love not include providing and feeding?
Do you not see that a Christian can show love to his neighbor as he loves himself? It is not that he does ALL THINGS as if he is his neighbor, or his neighbor is him (depending on your perspective.)
It seems you are describing ADOPTION, something that God includes in HIS work in the salvation of our souls. Do you see that you DO NOT need to adopt me to love me as you love yourself?
Example: If you are married, you do not want your wife doing immoral things with the guy next door. Also, you do not want that neighbor handling your wife, or gawking at her, or trying to get her to do immoral things with him.
Actionable legal issues can arise from this type of offense, and the perpetrator's own wife and family will likely shun him in the process. Most people who think this through are afraid of this, and do not pursue it for these reasons. That is carnal, natural and earthly.
So if you don't do any of that with your neighbor's wife for the motivation of Christian love for him, you are following Christ's command, and not the worldly law, per se! Can you see that this is not the same as being afraid of consequences of your offense? Then is the Seventh Commandment fulfilled. Also, part of the Tenth Commandment is fulfilled when you are not lusting after your neighbor's wife with a covetous heart.
Example: If you have a disagreement with your neighbor, you don't want to find yourself confronted with a knife or gun by that angry person. You do not want your life ended, because you have a basic, human love for your own self.
There are severe criminal penalties for each type of murder, and the pre-existing conflict sets up the perpetrator for a First Degree Murder conviction, and for the Death Penalty. Most people refrain for that reason alone. That is carnal, natural and earthly.
You should not imagine that you should kill him, or wish that he die in any other way. If don't do any of that to your neighbor, for the motivation of Christian love for him, the Sixth Commandment is fulfilled, and so on!