有这么好的朋友很幸福！:)

Have you noticed the difference uses of 都? 1.都 can mean both/all(i.e. 我们都喜欢狗). 2. 都 can indicate that you perceive something as a long time(i.e. 你都睡了一圈了，怎么还不起床？Note: 一圈 refers to the clock which has completed a cercle, or 12 hours. Perhaps you were trying to use this meaning of 都 in 我们都已经认识大概二十年了, it's a really nice try, but to a native ear, it seems like you are going to impress someone or mention something that shouldn't have happened after 20 years of acquaintance.）. 3 都 can indicate consistency and regularity(每个星期我们都喜欢一起去商店买东西 is a perfect use of this meaning of 都, well done!).