She's not in love with Sasuke. She's forcing herself to love him at this point, because she wants the good side of him back desperately. She really should've learned by now that that wasn't going to work. What she felt for Naruto is real, but it seems like she doesn't understand what love is. She could easily be lying.
Well but in this chapter she cleary said she was in love with him. Guess what would happen if sasuke turns good now. Do you really think she would give kitten about naruto? Now after she confessed again to sasuke in front of naruto even tho sai told her how much it hurt naruto?? 1 chapter to turn sakura in a hearthless kitten nothing more