Judas, not Iscariot, asked Him, Lord, how is it that You will reveal Yourself [make Yourself real] to us and not to the world? Jesus answered, If a person [really] loves Me, he will keep My word [obey My teaching]; and My Father will love him, and We will come to him and make Our home (abode, special dwelling place) with him. Anyone who does not [really] love Me does not observe and obey My teaching. And the teaching which you hear and heed is not Mine, but [comes] from the Father Who sent Me.
John 14:22-24 AMP
http://bible.com/8/jhn.14.22-24.AMP

When they had eaten, Jesus said to Simon Peter, Simon, son of John, do you love Me more than these [others do–with reasoning, intentional, spiritual devotion, as one loves the Father]? He said to Him, Yes, Lord, You know that I love You [that I have deep, instinctive, personal affection for You, as for a close friend]. He said to him, Feed My lambs. Again He said to him the second time, Simon, son of John, do you love Me [with reasoning, intentional, spiritual devotion, as one loves the Father]? He said to Him, Yes, Lord, You know that I love You [that I have a deep, instinctive, personal affection for You, as for a close friend]. He said to him, Shepherd (tend) My sheep. He said to him the third time, Simon, son of John, do you love Me [with a deep, instinctive, personal affection for Me, as for a close friend]? Peter was grieved (was saddened and hurt) that He should ask him the third time, Do you love Me? And he said to Him, Lord, You know everything; You know that I love You [that I have a deep, instinctive, personal affection for You, as for a close friend]. Jesus said to him, Feed My sheep.
John 21:15-17 AMP
http://bible.com/8/jhn.21.15-17.AMP

I give you a new commandment: that you should love one another. Just as I have loved you, so you too should love one another. By this shall all [men] know that you are My disciples, if you love one another [if you keep on showing love among yourselves].
John 13:34-35 AMP
http://bible.com/8/jhn.13.34-35.AMP

EVERYONE WHO believes (adheres to, trusts, and relies on the fact) that Jesus is the Christ (the Messiah) is a born-again child of God; and everyone who loves the Father also loves the one born of Him (His offspring). By this we come to know (recognize and understand) that we love the children of God: when we love God and obey His commands (orders, charges)–[when we keep His ordinances and are mindful of His precepts and His teaching]. For the [true] love of God is this: that we do His commands [keep His ordinances and are mindful of His precepts and teaching]. And these orders of His are not irksome (burdensome, oppressive, or grievous). For whatever is born of God is victorious over the world; and this is the victory that conquers the world, even our faith.
1 John 5:1-4 AMP
http://bible.com/8/1jn.5.1-4.AMP