If you want to know how to show him you love him, you should know some things in order to keep him and he will love you in return. Showing him that you love him deeply will definitely boost his ego and will stimulate your relationship in a relationship in healthy way. Words and deed should be present always in any relationship so that both of you will know how special you are to each other. "I love you" is important but you need to support this with your action otherwise the words would be meaningless. It is essential just to keep the fire burning and last for a long time.
You should be able to find creative and sweet ways on how to show him you love him.
1 - Love letters. You may think that this already has been an obsolete way of showing your love but did you know that it is still the sweetest way? Tell him the things that you love about him on your letter. Enumerate or list down the things that you find enjoyable about your relationship. Be careful with the details. Remember, your goal is to make him feel special and loved and not intimidated. It should always do wonders if you list all the traits that you find wonderful about him.
2 - Give him a breakfast in bed treat and feed him. You always have to remember that the best way to a man's heart is still through his stomach. This will not be a "popular adage" if it doesn't hold something true to it. It would be best if you choose finger foods so that you will not have a hard time feeding it to him.
Learning how to show him you love him is an excellent way to spice up your relationship so that you will know exactly where your relationship is going. It is best if you give your self a chance at a romantic love affair that will surely fulfill your wishes.