That is very simple, when you keep His words in your heart. How do you keep His words in your heart? When you study His word and talk them back to Him in prayer. When we fall in love with someone, we try to learn as much about that person as we can find out. We want to know their favorite color, their shoe size, their clothing size, their favorite type of food, just about every detail that we can find. We take our time to write that information down so that we can go back and refresh our minds. Sometimes we tell the person back the information just to show them that we were paying attention. Many times when we go to the store we buy the person little presents and cards and other things that they told us that they liked. Our minds are totally on that person as often as possible.
That is the same way were are to be with our Lord and savior Jesus Christ. We are to study Him and pay attention to His likes and dislikes, we are to do what His word says. Christ is not a task master or ungrateful in His reception of our love. He knows when we genuinely like Him. He knows when we show interest in Him by dedicating our time to getting to know Him. He appreciates the attention that we put on Him. When we show love to one another, He feel that love. When we are kind to others, He feels that kindness. When we naturally love with our action, He gets all the love back. All of that draws Him closer to us. When we love Him without expecting anything back, He will show us His appreciation in ways that we cannot comprehend.
Our Lord is a faithful friend and He will never leave us or forsake us. He will be with us till the end.