Sri Lanka's public library system has digitized many Sinhala works. Try:

Readers and reviewers on Goodreads (rating: 3.64/5) note that the book uses complex emotional "equations"—where life equals love multiplied by the future, and death is love divided by disappointment.

මගේ කුලුදුල් පෙම්වතිය – Mage Kuludul Pemwathiya

Mage Kuludul Pemwathiya (මගේ කුලුඳුල් පෙම්වතිය) is a well-known Sinhala romance novel written by the prominent Sri Lankan author . Book Overview Author: Upul Shantha Sannasgala. Genre: Romance / Young Adult Novel.

If Mage Kuludul Pemwathiya is published by a recognized house, it may appear on one of these sites. Check regularly or contact the publisher directly.