If they showed SAMUD touching and hugging it would look very awkward at the present moment. They have taken a step towards freeing KUMUD and laying a foundation for future union of SAMUD. There may be Pramads or Kusums in between but that is just to keep the suspense going on how will these lovers unite.
As for Kusum's feelings for Saras it's a crush...Meera aur Kanha ji ka shaadi tho nahi hua na!!!!
Use pyar karne do, kya farak padtha hai!