Do we love Jesus?

In the last verse of Paul's letter to the Ephesians, he wrote, "Grace be with all them that love our Lord Jesus Christ in sincerity. Amen." In Philippians 1:9-10 he wrote, "And this I pray, that your love may abound yet more and more in the knowledge and in all judgment; that ye may approve things that are excellent; that ye may be sincere and without offense till the day of Christ;..." In both of these letters he mentioned being sincere, which means to be honest, genuine, and without hypocrisy. He admonished them and us to love Jesus sincerely and to live sincerely and without offense till the day of Christ. How can we know if we are being sincere in loving the Lord? Jesus gives us the answer several times in the word. One of these is found in John 14:21 where he said, "He that hath my commandments, and keepeth them, he it is that loveth me..." Let me ask this obvious question, do we love Jesus?