Indonesian People

I was surprised. suppresed, cause  People of Indonesia are very friendly here., and It makes me happy that friendliness is a part of Indonesian culture. , as a reason our culture, Indonesia culture!!,

You can get make many friends from in Indonesia., haha :D,

Notes: 

Did you mean to say you were surprised?  If so, what were you surprised about?  Did you intend to say that you were surprised that people are friendly in Indonesia?  You are from Indonesia, so I wouldn't think you would be surprised by how people act there.  The word "suppressed" means somthing else entirely, and does not fit the context. The Indonesian equivalent, according to one dictionary I consulted, is "tertindas."

Alternatives for the second sentence: 

People in Indonesia are very friendly.

The people of Indonesia are very friendly. 

The people in Indonesia are very friendly.  

I am not sure what you intended to say in the third sentence.  I provided you with one possible correction.  

I hope that helps.