Representing myself in a home purchase

[Guillam Landrum]

Here's an odd question, but I haven't been able to find the answer elsewhere. I have a California broker's license, but I'm not affiliated with any kind of real estate agency - in fact I have no experience in residential real estate at all (my background is entirely in CRE).

My girlfriend is purchasing a home here, and I'm wondering if I can act as her agent and collect the buyer's agent's fee.  Or would I have to be affiliated with an agency?  

Thanks in advance for anyone who might have some insights on this.  Much appreciated!  

GL