I'm glad to see you're wearing the sweater I gave you.
It's good to see you're getting some use from the sweater I gave you.
この場合は、次のように言うと自然で良いと思います。
ーI'm glad to see you're wearing the sweater I gave you.
「私があげたセーターを着てくれてて嬉しい」
to wear the sweater I gave you で「私があげたセーターを着る」
ーIt's good to see you're getting some use from the sweater I gave you.
「私があげたセーターを使ってくれてて嬉しい」
to get some use out of/from ... で「…を使う・利用する」
ご参考まで!
ご質問ありがとうございます。
・「Thanks for wearing the 〇〇 I gave you.」
=私があげた〇〇着てくれてありがとう。
(例文)Thanks for wearing the shirt I gave you.
(訳)私があげたシャツ着てくれてありがとう。
(例文)Thanks for wearing the jacket I gave you. It looks great on you!
(訳)私があげたジャケット着てくれてありがとう。似合ってるよ!
お役に立てれば嬉しいです。
Coco