見とれていた

was/were gazing in admiration

→ 見惚れる
phrase Rare #39,645
was/were gazing in admiration The past progressive form of 見とれる, used when someone was captivated by or admiring the beauty of something or someone.
JA: 彼は窓から見える雪景色に見とれていた。
EN: He was gazing in admiration at the snowy scenery outside the window.

トムメアリー手をつないで景色見とれていた

Tom and Mary were holding hands, captivated by the view.

また自分に見とれていた

Were you admiring yourself again?

— マルホランド・ドライブ (2001)

彼女の顔美しさ僕はただ見とれていた

I was simply captivated by the beauty of her face.

私たちはきれいな夕日見とれていた

We were captivated by the beautiful sunset.