"Inevitable" song, can you please interpret it to me? I love it.

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I was searching in the net for downloadable mp3 songs when i came across this song by shakira. I listened to it, though it's in spanish, and enjoyed it. I like the beat, the lyrics (as if i understand..hehehehe), just everything about the song. The way it sounds and the way it was sung, i think the song is about a person so in love and she was telling how strong is her feeling to the person. Again, just my personal opinion. Will someone please help me understand the song? I 'm just fascinated with spanish songs even though i don't understand them. I had spanish class in college, but it's not enough to comprehend the songss..hahahaha.