do you believe in international friendship between students?

I am from ukraine and I have been to china for one year as a student, also, now live in the uk, i had so many friend when i was in china, but with time they all got lost, do you think it is possible...

what is the most important in our life to make it happy?

I am in such depression last few mounth and i am trying to find a very simple answer to this question what we should do for our life to keep it happy all the time, to smile and love this...