Viktoriya ,

So , I get it , that he has your Phone number.Right ??
You gave it to him , so , you trust him , or you feel , that it is
another step , in your relation with him.

Then , I ask myself , your conversation , early that evening , was there a specific
topic , that you two , talked about ??

I can`t think , of a reason , why , he want to call you , at 2 o`clock , in his country =( 03.00 AM in Ukraine)

Or maybe , he was checking , if you were sleeping alone ???

At what level , would you say , that your relation with him is now ?
And , he don`t need to sleep , to go to his work ??

Eric