what is the best friend song

I'll be there for you by the Rembrandts,which is also the title song for the hit sitcom series the Friends.

Friends by Stephanie is also good... whenever I listen to it I can't help but realize how important friends are to me.

well me and my best friend share a common favorite song.well it is from a Bollywood film called gajhini.well most of the times when she is sad i also become sad and when im sad she also becomes sad , so at that time we both start that song together.that moment is really great for me and i think for her too.well she is not here with me right now so im listening that song and remembering her. Actually the song best describes her as that song is full of life as my best friend is.