You can say "bambino intendi il mondo a me".
Italian has two basic ways to show love : One is "Ti voglio bene" - I care for you, mostly used for family members like brother sister. The other is "Ti amo", I love you, used by l0vers.
You can also say "ti adoro" (I adore you) and "adoro il gelato alla cioccolata" (I adore chocolate ice-cream).
Whether it's an operatic aria, a love poem, or whispered sweet nothings, many people believe that the phrase "I love you" is best voiced in Italian, which is considered a romance language. Check out 100 Ways to Say I Love You in Italian, shared by About.com.
Learn more Italian Love Phrases from Life in Italy.