Cannot get my music from my phone onto my computer again!

I could not get my music from my computer to my phone ever since I got a new MacBook, so I used iCloud to get it on my phone. Now my music is on my phone, but I cannot play my music on my computer because I cannot click on songs! The songs are still there, but they are a lighter color than the rest of the songs and they cannot be selected or played or anything. HELP!