I want my little brother to play Xbox live without my account

He can only access your Gold without your account as long as he is playing on your Home console. However, you can only set 1 console as your Home at a time. You can switch this, but you can only change it 5 times per year.

Another option would be to add Gold to his account as well.

Make sure the security proofs are updated on account.live.com. The password and email may not be incorrect, but will show up as such if the proofs aren't updated. Try updating the proofs then redownloading the profile.

Apparently my girlfriends' little brother is a 9th prestige and thinks i'm a noob...

...and i have to play with him if i want to play on the xbox at her house

Can you share your Xbox live gold with your little brother who lives in a different household. Mind you I'm 23 and have my own place.

Yes you can but your little brother has to have his own Xbox and so do you. Guidelines: 1. Put your Xbox account on the Xbox to your little brother. 2. Go to your account that you put on this xbox. 3. Press the Xbox  button to open the guide.

Select System > Settings > General > Personalization, then select My Main Xbox, then select My Xbox Home.

Do one of the following:

Select Set as my main Xbox to designate this console as your main Xbox.

I hope i was helpful

Re-post to this. I had 2 Xbox accounts, one being my brothers, and the other being mine. I paid my brother for his account, because it had DLC, and other games, and he no longer played Xbox. I am wondering if there is a way to make it so I can have the games
that he bought, without having to log out of my account to access his account.

P.S I cannot play on his account, because his payment options and information is on there, and doesn't want me to use it, so transferring games to my account is essential.