When I go shopping with my friends, I always worry about them having to wait for me.
I like to go shopping by myself so I don't keep anybody waiting.
ーWhen I go shopping with my friends, I always worry about them having to wait for me.
「友達と買い物に行く時、いつも私を待たなきゃいけない友達に気を遣う」
to go shopping で「買い物に行く」
to worry about で「気を遣う・気にかける」
ーI like to go shopping by myself so I don't keep anybody waiting.
「誰も待たせなくていいから、一人で買い物に行くのが好きです」
to keep someone waiting で「人を待たせる」
ご参考まで！
カナダ 
