I usually treat myself to a meal on Friday for all the hard work I did during the week.
I often eat out on Friday to treat myself for a job well done over the week.
英語で、myself who did のような表現をあまりいいません。ほかの言い方を使います。
理由を説明の言葉:
I praised myself for working hard. (for -ing)
I treated myself because I worked hard. (because)
I worked hard so I treated myself. (so)
頑張った
I worked hard.
I did my best.
I hung in there.
よくやった
a job well done
my hard work
一週間
over the week
during the week
that week
I usually eat out on Fridays to reward myself for working hard all week.
・I usually eat out on Fridays to reward myself for working hard all week.
「一週間頑張って働いた自分をご褒美として褒めるために、金曜日にはたいてい外食に行きます」
reward myself for ... で「～に対して自分にご褒美をあげる・自らを労う」という意味になります。
・I treat myself to dinner out on Fridays to reward a week of hard work.
「一週間の頑張りを労って、金曜日は外食（夕食）に行って自分をご馳走（ご褒美）します」
アメリカ合衆国 
