anybody know what's the meaning of this indian song?

the name of the song is 'Koyal' remixed by Nitin Sawhney. i fell inlove with this song the first time i heard it, i found the lyrics on internet, but its in indian language. can anybody tell me the meaning of this song? and also introduce me some more similar nice indian love songs like Koyal?

the Koyal lyrics i found on the net goes like this,

kyun koyal bole patjhad mein

aur sawan mude amber mein

piya milan ki bela mein

kyun rut badle be-mausam mein

kyun kali raton ke pat par

rang chhidakata hai jam kar???

haan paa kar tumko saajan mere

kyun zoom utha mera kan kan

sun mitwa kyun man matwaara

naach raha tan man saara

gunje sargam payal chalkara

sangit ka naata tumhara

kyun rut badle bemausam mein