落ち込むなよ

don't get discouraged

→ 落ち込む
phrase Rare #38,510
don't get discouraged An informal way to tell someone not to feel depressed, discouraged, or down. The ending なよ makes it a direct but often sympathetic prohibition.
JA: 試験に落ちても、そんなに落ち込むなよ。
EN: Even if you failed the test, don't get so discouraged.

落ち込むなよ君を傷つけるつもりじゃなかったんだ

Don’t be so down. I didn’t mean to hurt you.

そう落ち込むなよ

Don't get so down.

そんな落ち込むなよ

Don't get so down!

落ち込むなよ

Don't let it get you down.

— ビッグ・シック ぼくたちの大いなる目ざめ (2017)