Lilya 4-Ever (2002)
Well acted and directed film about a vulnerable 16 year old girl, abandoned by her mother or guardian, struggling to survive on the streets of Estonia and later in Sweden. Her only friend is a young boy in a similar position.
An affecting film but, dear god, it is relentlessly harrowing. By the end Lilya has been victimised by so many people, it leaves you feeling disgusted with mankind and men in particular. Good film but potentially depressing.
http://uk.imdb.com/title/tt0300140/