To "love your neighbor as yourself' means to love him in all of the ways that your mind and your heart agree are appropriate for people to act in loving ways with their neighbors, who are all other people. That is, for example, Reuven wants Shimon, who loves him to act in a faithful and loving way in all the ways that Reuven thinks are appropriate which are as follows:
1. That he should love me honestly and not in a fake way.
2. That he should always act towards me with honor...
3. That he should always inquire into my welfare.
4. That he should offer solidarity when I suffer.
5. That he should great me with friendliness when I enter his home.
6. That he should judge me favorably in all things.
7. That he should volunteer with his body for any small task for which I need his help.
8. That he should help me with a loan or gift of money should I need that assistance.
9. That he should not act superior to me.
And he will think in his mind and conclude with his heart other ways of showing love similar to these. But he would not think that Shimon should give him all of his money or property out of Shimon's love for him. For Reuven would not want that or espect that for logic cannot accept that and it makes no sense to obligate others in that way.
We see that all of these numbered ways that Reuven wants Shimon to act in a loving way are things that Reuven in turn is obligated to provide to Shimon...And this is the meaning of "loving your neighbor *as yourself.*" That is to say that the love for your neighbor should include all of these ways, just like you would want from a neighbor who loved you. And in this way the mitzvah is fulfilled in its entirety. There is no need for one to give all of his possessions or property or money to another out of love for him since he would not want that from someone else.
And now the problems that various commentaries have raised are resolved. They ask "how can the Torah command something that is against nature and that no person could ever live up to? And in response to this question many unsatisfactory answers were offered: "love your neighbor as yourself is a mere exaggeration, and some say you should give back the same benefit to your neighbor that you receive ...But none of this is necessary. For in truth we do not need any of these far fetched solutions because the word "as yourself" is not a challenging word to understand for the Torah commands us something very logical and natural and that every person can carry out...