3 sentences

1. 她是我最贴心的闺蜜。

   tā shì wǒ zuì tiē​xīn de guī​mì.

   She is my most intimate best friend.

   Source: Dong Chinese Dictionary

2. 你们永远是我的贴心小宝贝。

   nǐ​men yǒng​yuǎn shì wǒ de tiē​xīn xiǎo bǎo​bèi.

   You'll always be My sweet little babies.

   Source: OpenSubtitles

3. 这件小礼物送得很贴心。

   zhè jiàn xiǎo lǐ​wù sòng de hěn tiē​xīn.

   This small gift was very thoughtful.

   Source: Dong Chinese Dictionary