hello, almost I never usually write, the case ...
I have a best friend and I are like brothers but there is something that bothers me.
I do not want to do something but he insists and insists, and that forces me to do so in order that our friendship will not change but I think that makes more and continue to insist that bothers me what should I do?

You should confront your friend about it and make it clear that it makes you uncomfortable. Hopefully he'll come to that understanding.