We, certainly, cannot trust in the emotions of our own hearts to determine if we love God and others:
"LET NOT THINE HEART DECLINE TO HER WAYS, GO NOT ASTRAY IN HER PATHS. For she hath cast down many wounded: yea, many strong men have been slain by her.
HER HOUSE IS THE WAY TO HELL, going down to the chambers of death." Pro 7:25-27.
What does the Scripture tell us about loving God and others?
Jesus said, "If ye love Me, keep My commandments." John 14:15.
Jesus said, "HE THAT HATH MY COMMANDMENTS, AND KEEPETH THEM, HE IT IS THAT LOVETH ME: AND HE THAT LOVETH ME SHALL BE LOVED OF MY FATHER, AND I WILL LOVE HIM, AND WILL MANIFEST MYSELF TO HIM." John 14:21.
When Jesus gave us the "Two Greatest Commandments," He was quoting the law. Deut 6:5; Lev 19:18:
"By THIS we know that we love the children of God (Greatest Commandment #2), when we love God (#1) and keep His commandments. FOR THIS IS THE LOVE OF GOD THAT WE KEEP HIS COMMANDMENTS: and His commandments are not grievous." 1 John 5:2,3.
"And THIS is love that we walk after His commandments." 2 John 6.
HIS CHURCH KEEPS HIS COMMANDMENTS: "And the Dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ." Rev 12:17.
HIS SAINTS KEEP HIS COMMANDMENTS: "Here is the patience of the saints: here are they that keep the commandments of God, and the faith of Jesus." Rev 14:12.
"As far as the east is from the west, so far hath He removed our transgressions ("of the law" 1 John 3:4) from us...TO SUCH AS KEEP HIS COVENANT AND TO THOSE THAT REMEMBER HIS COMMANDMENTS TO DO THEM." Ps 103.
Covenants have conditions.
Even in heaven, the Lord makes quite a statement about His Covenant:
"And the temple of God was opened in heaven, and there was seen in His temple The Ark of His Testament: and there were LIGHTNINGS, and VOICES, and THUNDERINGS, and AN EARTHQUAKE, and GREAT HAIL." Rev 11:19.
At the very end of the Book of all books, the Apostle John wrote, "Blessed are they that do His commandments, that they may have RIGHT to the tree of life, AND MAY ENTER IN through the gates into the city." Rev 22:14.