1. We are tight.

我们关系可铁了。

2. We are on good terms.

我们关系很好。

3. She is very close to her father.

她跟她爸的关系特别好/她跟她爸之间的感情十分亲厚。

4. We are great buddies.

我们是好哥们儿。

5. She is my BFF(Best Friend forever).

她是我的好闺蜜。

6. We've been pally for years.

这些年，我们关系一直很好。

7. We get on well enough, but we're not really close friends.

我们相处得还不错，但不是那种特别亲密的朋友。(21世纪)