Love your neighbor as yourself
Actually, Jesus was quoting from the Torah when he said that. When questioned about it, he responded with the parable of the Good Samaritan. Keep in mind that Jews and Samaritans in Jesus' day despised each other. Jesus wasn't saying, "Have feelings of love for everyone." He was saying, "Treat everyone with decency, respect, fairness, and kindness, even if you don't like them." The Torah quote (taken in context) says pretty much the same thing. Love as an emotion can't be extended to the whole world, but love as a principle of how to treat people can be.