How Do I Say, "I love you?"

How do I say, "I love you?" (Wo gai zen-me shuo, "Wo ai ni"?) (我该怎么说，"我爱你"?) I love you. (Wo ai ni.) (我爱你。) I love you! (Wo ai ni!) (我爱你！) How do I say, "You are beautiful?" (Wo gai zen-me shuo, "Ni hen mei"?) (我该怎么说，"你很美"?) You are beautiful. (Ni hen mei.) (你很美。) You are beautiful! (Ni hen mei!) (你很美！) How do I say, "I wish you eternal happiness?" (Wo gai zen-me shuo, "Zhu ni yong yuan xing fu"?) (我该怎么说，"祝你永远幸福"?) I wish you eternal happiness. (Zhu ni yong yuan xing fu.) (祝你永远幸福。) Eternal happiness! (Yong yuan xing fu!) (永远幸福！)