How do you say

We are planning to go climbing this weekend to foster our friendship.

..in Chinese?

我们打算周末一起去爬山,增进彼此的感情。

wǒ men dǎ suàn zhōu mò yì qǐ qù pá shān , zēng jìn bǐ cǐ de gǎn qíng 。

How do you say "It has been three months since I last saw my friends, and I really miss them." in Chinese?