The Sawaariya guy Ranbir Kapoor made his debut with Sonam Kapoor but it is the Om Shanti Om gal that rules his heart. Much was speculated about Sonam-Ranbir's on-screen chemistry but every assumption proved wrong when Ranbir finally proposed Deepika Padukone. But the heartthrob prefers keeping friendship and love life separately and says that he would always treasure the days he and Sonam spend together.