Can someone help with my introduction paragraph?

[mFer8atMiamiilQ8iyam]

Okay so in my essay I write my first paragraph. The teacher said that all of it is a thesis. I don't get it.
My thesis is: Having friends from other cultures can effect how others view theme selves and their culture: 1) experiencing other cultures 2) appreciate their own culture 3) ashamed of their culture.
What can the intro be?

 

[DevarajanSekaran]

I think you can talk something very common in humanism in the intro of this essay. By the way you can precise very well about different culture in furthur!