What should I do？

I really scare....
I scare people cry><
i dunno wat should i do when sumone crying...
安慰的话不是很会说,
怕我说错, 让人更难过...
真的不懂   不懂该做什么？！？

Someone can teach me？！？
Wat can i do when i saw my friend cry o sumthing？