Kung Ako na Lang Sana (English: If Only I Could) is a 2003 Philippine romantic comedy-drama film written and directed by Jose Javier Reyes, based on an original concept developed by Tammy Bejerano, Theodore Boborol, Mary Rose Colindres, Emmanuel B. Dela Cruz, and Dennis C. Teodosio. The film's title was based on a song of the same name composed by Soc Villanueva and performed by Bituin Escalante, which was the winning entry at the previous year's Himig Handog competition.
Starring Sharon Cuneta and Aga Muhlach in their first film together as lead stars, it revolves around two friends who have been close to each other since their college years, and as time passes, they realize that they have feelings for each other. It also stars Christine Bersola, Dominic Ochoa, Mickey Ferriols, Jennifer Sevilla, and Shintaro Valdez.
Produced and distributed by Star Cinema, the film was theatrically released on 24 September 2003.
Since their college days, Emmy and Vince have been very close friends. Years after they graduated and have their successful careers, Emmy realizes that she has feelings for her best friend, but gets worried that their long-time friendship will end if she does not confess to him.
Comedian Vic Sotto and actress-presenter Kris Aquino were originally chosen to play the respective roles as Vince and Emmy. However, the former backed out of the project due to his decision not to meddle with the latter's then-heated relationship with Joey Marquez.
The project serves as Christine Bersola's feature film debut, though second if counting a student film during her university days.
Filming was halted in early May 2003 when Aga Muhlach got an eye infection. While recovering, Sharon Cuneta spent the supposed filming schedule to promote Walang Kapalit, her film with Richard Gomez.
Eric John Salut, writing for Pilipino Star Ngayon, gave the film a positive review, citing its storyline as "unique" and different from the usual storylines of love and friendship.