なれた

was able to become, could become

→ 成る
verb · informal, past tense Rare #24,415
was able to become, could become Past form of the potential form of 成る.
JA: 彼は念願の教師になれた。
EN: He was able to become the teacher he had long hoped to be.
Conjugation of 成る

こんなに穏やかな気持ちになれたの初めて…

I've never felt this at peace before...

— ハウルの動く城 (2004)

友達になれたと思ってた

I thought we’d become friends.

— 映画 聲の形 (2016)

捨丸兄ちゃんとなら私…捨丸兄ちゃんとなら私…幸せになれたかもしれない

If I’d been with you, Sutemaru… if I’d been with you, I might have been happy.

— かぐや姫の物語 (2013)

一緒に大金持ちになれたのによ

We could have become filthy rich together, you know.

— 続・夕陽のガンマン (1966)

彼女と友達になれた時は、それはうれしかったですよ。

I was so happy when I became friends with her.

彼が会社の社長になれたのは、彼の努力と勤勉の賜物です。

He became the company president thanks to his hard work and diligence.

お近づきになれたね

We've gotten to know each other better.

— ダイ・ハード (1988)