I so agree...this love thing is one of the Greater Mysteries of the kingdom!! :)
But, I find peace in knowing that God gave the law to Israel which they could not keep...so He gave them the blood of bulls and goats and a Day Of Atonement for them to get free of sin each year...foreshadowing The Lamb who was to come..'.once and for ALL. '
Therefore with this love thing...I have peace in being aware that none of us can keep it or attain to it ...not many see that what is called " The Sermon On The Mount " is an unreachable standard. ( yet they demand that it is the "Christian standard" )
Jesus even lifted the Law HIGHER that the Ten Commandments ...
" If a man thinks it.." Jesus moved it from doing, to thinking or looking!!!!!!
Yet how many ( foolish) christians parrot- " But we must obey Jesus and keep His commands here."

They believe the Sermon is our standard to live by!!!!
Christ is our ONLY Standard to live by...and
we cannot do it...it cannot be done! God knows that very well...
So 'us loving perfectly' ...yes, is not attainable within ourselves...but only credited to us,
as we remain hidden in Him..who is our life.
And, just think...on top of that God gives US a reward of faithful service!! :)
That which we cannot do
in our own strength... yet He blesses us as if we did!
But as Paul could say:-
"
I have fought a good fight, I have finished my course, I have kept the faith:....Henceforth there is laid up for me a crown of righteousness, which the Lord, the righteous judge, shall give me at that day: and not to me only, but unto all them also that love His appearing."
Do we have The Faith? YES!! :)
Praise the Lord.....I can feel a glory shout coming on!!