How could i say the 3 words to him when my hearts says that im still in love with another person? im confused.

Love is really complicated.

Every minutes, every seconds, every hour, every days and nights, as day passes, i cant stop thinking and wondering how's life gonna be. How long will i walk at this path all the time?

Im trying to find the path that i've been searching for but its just so hard for me.

Please tell me why.