如果你想表達在MSN上暗戀人，一些可能的英文金句包括：
* I've been admiring you through MSN.
* I've been crushing on you through these messages.
* I've been secretly crushing on you through our MSN conversations.
* I've been harboring feelings for you on MSN.
* I've been silently admiring you online.
請注意，這些表達方式可能因文化和個人偏好而有所不同。確保選擇符合你個人風格和對方可能接受的表達方式。