The advice of loving your enemies vs hating their sin isn't contradictory at all, if you study the Bible with an open heart, led by the Holy Spirit. When Jesus hung on the cross and prayed for forgiveness for His enemies, He never once tried to minimize what they were doing, or to say that it wasn't really that bad.
Hebrews 12 gives such a stirring instruction on how we should deal with all the troubles and trials of life, including ones where people have hurt us.
Hebrews 12
1 Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight, and the sin which doth so easily beset us, and let us run with patience the race that is set before us,
2 Looking unto Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.
3 For consider him that endured such contradiction of sinners against himself, lest ye be wearied and faint in your minds.
In other words, if our Master Himself endured such suffering at the hands of sinners, we can find the patience and strength to deal with the wrongs done to us by others, by looking to His example.
4 Ye have not yet resisted unto blood, striving against sin.
5 And ye have forgotten the exhortation which speaketh unto you as unto children, My son, despise not thou the chastening of the Lord, nor faint when thou art rebuked of him:
6 For whom the Lord loveth he chasteneth, and scourgeth every son whom he receiveth.
7 If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not?
8 But if ye be without chastisement, whereof all are partakers, then are ye [censored], and not sons.
Sometimes we get caught up in the chastisement of others, especially someone very close to us, like our spouse. Still, we can trust that God will only allow the things to happen to us that He can work for our best good, and for His glory.
AJ's adultery - the worst pain of my life - was a very harsh scourging. Yet God allowed it to purify me; to take away defects of character that were an obstacle to closeness with Him. He taught me to listen to Him, and to be patient when there was no visible hope. I am a child of the King, and more aware of that now than ever before.
9 Furthermore we have had fathers of our flesh which corrected us, and we gave them reverence: shall we not much rather be in subjection unto the Father of spirits, and live?
10 For they verily for a few days chastened us after their own pleasure; but he for our profit, that we might be partakers of his holiness.
That bears repeating. Our trials, even those where loved ones wound us and shatter us to our very core, are permitted so that we can be partakers of Jesus' holiness. He places such a high value on purity and holiness that He gave up His own blood to preserve it in us.
11 Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby.
12 Wherefore lift up the hands which hang down, and the feeble knees;
13 And make straight paths for your feet, lest that which is lame be turned out of the way; but let it rather be healed.
14 Follow peace with all men, and holiness, without which no man shall see the Lord:
15Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled;
And here we come to the whole crux of the matter, as it relates to an OP. We are to be
diligent lest any root of bitterness spring up within us.
So no matter what love, what righteous anger, what longing for the day of God's judgment to be poured out on the wicked for their cruelty, or any other seemingly conflicting emotions we may feel...
we are to be diligent that we do not become bitter.