Sasuke like Sakura is driven by strong emotions,Sasuke to avenge the wrong done To His brother by the Elders and the 3rd Hokage and anybody that gets in His way including Sakura. Sakura is driven by the need to have Sasuke love and approval, question is how far Her obsession will lead Her? She doesn't know yet the acer to that question,thats why the hesitation,thats why She wishes someone else would resolve it for Her and yet get Her wish of having Sasuke for Her own. Unfortunately life dos not always grant us what we may want.
Would you kindly point to the specific chapter that she shows her ''obsession'' for Sasuke?
Just like Naruto she wants to save her friend... She has already tried to help him through expressing some kind of love romantic?!? just so she could save him from the darkness and loneliness - part 1...
Actually she tried convincing him to stay in the village with every method she could nothin' worked, why do you think she warned him that she would scream if he would left?
Again she cares deeply for him , but obsessed? Nah.
That is what we in the last chapters she was happy that he was there to help them , that team 7 the family was together again.. well almost..
You are mistaking the character.