Expressing your affection for your little sister can strengthen your bond and make her feel loved. Sharing heartfelt words in English can be a beautiful way to show your appreciation. Whether it's a simple 'I'm so proud of you' or a more elaborate message about her strength and kindness, your words can have a significant impact. You could say 'You are the sunshine in my life' or 'Watching you grow has been my greatest joy'. These simple yet meaningful phrases can create lasting memories.