After 5 months here, I can think about 5 “reasons”..
Xiao Jie
Meng Meng
Sun Pei
Wang Xian Lan
Sha Sha (on the left)
Yes, they are all over 18 
they are only friends; except 2 they speak almost only Chinese; I do not meet them socially very often if at all (at least not in date form)..
Still, my Chinese is very yi dian dian.. little little understanding, in my case, zero!!
good luck with learning mandarin, jiayou! ^.^
I told you that you would benefit from learning some Zhong wen in Stavanger