YOU SAID:

I was going to go to the store but I decided not to.

INTO JAPANESE

私は店に行くつもりでしたが、やめようと決めました。

BACK INTO ENGLISH

I was going to the store, but decided to stop.

INTO JAPANESE

私は店に行きましたが、やめることにしました。

BACK INTO ENGLISH

I went to the store but decided to stop.

INTO JAPANESE

私は店に行きましたが、やめることにしました。

BACK INTO ENGLISH

I went to the store but decided to stop.