I FOUND THE SOLUTION!
if you are wanting to access music from your itunes, and your album cover/art does not show under 'library' , i have found the solution. steps:
1- delete your music off of the google music player. (especially if you had hooked up your nexus and got your music onto your device via computer)
2-using your computer, go onto google's music website
3- search for "my music manager"
4- install (spam free/ safe, you will not regret installing)
5- link the program to your google account (email, plus, etc.)
6- the program will create a 'cloud;' where all of your content (pictures, music, videos, etc) will be stored.
7- 'run' the program and follow directions. it will take all itunes files and automaticly store them in your 'cloud'
8- wait patiently as your music is transfered (you can set it up so that all future itunes purchases will automaticly transfer to device)
9- access music on your device easily
10- album cover will now be shown in 'library' on home screen.
Problem solved