Sakshi being an orphan is craving for love and her BF is just utilising that weak point...till now Sakshi does not have anyone to calll her own. I am sure, she will know what true love is when she comes in contact with Alekh, Khushi, Ragini and everyone. She will have a complete family.Again i say Sara should not return, to me the essense of Sadhna will be gone, if she comes back and as someone else
Also yes i can see that happening that he forces her to marry AlekhBut i think the main thing will be how love and respect changes ppl and i think Sakshi will go through this and how you can love a unnormal man, and that unnormal unstable man is 10 times the man her so called boyfriend would ever be