Adding music to iPhone 5 without iTunes?

I have a white Macbook from 2009 and my latest software on it is Mac OS X, Version 10.5.8. Now I KNOW I'm very behind on my upgrade but I should be getting a new macbook within a few months and I do not want to buy the software upgrade because I know my new macbook will come with it. Now, because of this, Apple won't let me update my iTunes, which means I can't put music on my iPhone 5 that I have had since the day it came out. I've tried to let it go but I need my music! Is there any ways of getting my music on my iphone without itunes!

Not possible. I'm sorry

Here are some great itunes alternatives.

http://www.wondershare.com/apple-software/free-alternatives-to-itunes.html

itunes can be cumbersome, and won't let you always do what you want.take a look and I hope it helps you out.

Download an app called music download pro/free, the app is blue, with a lighter blue arrow with a music note on it, anyways, if you go to the search part, type in the name of the song, followed by either "zippyshare.com" or "4shared.com" and click on the website, hit download, and the app will play it just like the real music library. For example if i were trying to download "remember you" by the weeknd and wiz khalifa, id type in "remember you wiz khalifa zippyshare.com." I'm sure there's more websites that i don't know of so play around with it. When you get your new mac, then download them again to put them in your actual music library.