You shouldn't spend all your energy working if you're going to get run down from it.
You shouldn't spend too much energy worrying about other people if it's going to wear you out.
このシチュエーションでの「そこまで...する必要ないよ」は
You shouldn't spend all your energy 動詞のing
You shouldn't spend too much energy 動詞のing
を使って表現できると思います。
1) You shouldn't spend all your energy working if you're going to get run down from it.
「（働きすぎて）疲れきっちゃうなら、そこまでする必要ないよ。」というニュアンスです。
get run down で「疲れきる」
2) You shouldn't spend too much energy worrying about other people if it's going to wear you out.
「（人を心配しすぎて）疲れきっちゃうなら、そこまでする必要ないよ。」というニュアンンスです。
wear 人 out で「人を疲れさせる」
ご参考になれば幸いです！
日本 
