mmmm..
where are russian girl from?
If she lives in Russian speaking countries - these sentences are absolutely normal.
If now she lives in the US (for example) maybe - unnatural...
ты or Вы: this depends on how long and how close you communicate.
If male can see female on work or on bus stop (for example, and they are not acquainted) and he wants to say to this femal about his feelings. = Yes. Only Вы.
But if they know each other and easy communicate = I think ты is OK.