According to me the most romantic songf is the title song of 'Hum Dil De Chuke Sanam'. In this song you can see the disturbance that is created when you are departing a loved one. You can feel the song humming inside you after you have heard the song. The song has been fantastically sung by the classically traind voice of Kavitha Krishnamurthy.
Right from Lyrics, music, voice to choreography this is the ultimate work of perfection.
This song is the favorite song of all who involved with this work, from Aamir,Ayesha Julka, Udit Narayan, Sadhan Sargam, Jatin Lalit, Mansoor Khan ,Farah Khan... the list goes on.
This is the song which can be heard most in campuses even now...
i think its pal pal dil ke paas,bahoon main chale aaoo , chand chupa badal main ,aashiq banaya ,ham tumhe chate hia aase , jane janaa = jabaaz ,bhoole se surat , kise se tum payara karo= andaaz
My all time favorite romantic song is Pehla Nasha.The song simply evokes all that is true in love....... And yet another favorite Tujhe Dekha thoyeh jaana Samnam