Love your enemies is not designed to be an unreachable utopian ideal - neither is it intended to make us feel that we will never be able to live up to Jesus’ expectations.
It is, in fact, a very specific, practical and life-sustaining imperative. Consider the alternative… We either love our enemies or we end up hating them, or at the very least, disregarding them.
The only way the Kingdom of God becomes a reality in our world is when God’s people love others - not just friends, but ALL others - as a general approach to life! This is the way of Jesus… the way we are called to follow him in.
None us us does it perfectly. Yet, this quality of love remains the guiding star for the direction of our life. This goal stands as the ever present hint of where the richest life is always to be found.