在英语中，表达“我想你”的高级说法可以采用更诗意、深情或正式的语言。以下是一些例子，每种表达方式都在50字以内：

1. "I find myself yearning for your presence."

2. "Your absence leaves an indelible mark on my heart."

3. "I am overcome with a sense of longing for you."

4. "The distance between us feels unbearably vast."

5. "I am haunted by memories of your smile."

6. "Your image dances in my thoughts, an elusive dream."

7. "I am captured by the echo of your voice in my ears."

8. "The touch of your hand, so distant yet so vivid."

9. "I am overcome with a profound sense of missing you."

10. "Your absence is a constant companion in my solitude."

这些表达方式通过使用更复杂的词汇和句式，传达了对对方的深切思念，同时避免了直接和简单的表达。