Jesus did not command us to love ourselves. We know of no Scripture that teaches that an individual does not already love himself. Christians were not admonished to love themselves or to hate themselves. Those who complain about not loving themselves generally are dissatisfied with their feelings, abilities, circumstances, etc. If they truly hated themselves they would be happy to be miserable.
All human beings love themselves.
From the totality of Scripture, and within the particular context of Matthew 22, the love one naturally has toward himself is commanded to be directed towards others. We are not commanded to love self. We already do. We are commanded to love others as we already do ourselves. The story of the Good Samaritan, which follows the commandment to love one's neighbor, illustrates not only who is our neighbor, but what is meant by the word love.