i got a new computer and ALL my music is gone, do you guys know if theres anyway i could get it back? like if limewire can email it to me? i know apple does if you used itunes.

The only way you have a hope of getting your songs back is if you make a CD or DVD from your old computer and then transfer the songs to your new computer like that.
I don't know where you got this idea that apple e-mail it's customers all their previosly saved files but it is an incorrect assumption.