You can show love however, demonstrate the power of love. One can experience love in the giving and the receiving of it. Costing nothing, but the value of love is worth more than all the treasures in the world. It does not matter the language used to express it, je t'aime, ik hou van je. The feelings are the same regardless of nationality or color.
Nothing is held in such high regard.
Songs sung about finding and losing love. Books by the hundreds of thousands and writings of all the great authors. There are many forms of love and for different things not just love of another. However the love a person gives can bring such strength and hope. Never be afraid to say I Love you, these words carry a part of your very being to someone.