What should I do?

I have lived in Austin, TX for the last year with my on/off girlfriend of the last 10 years. We both used to live in Atlanta, GA. Since moving I have been very depressed. I have had bouts of depression in the past and have taken meds but I've never been this miserable. I transfered jobs from there to here and since moving I've lost my job and can't find anything anywhere. I am homesick as well. I miss my parents and friends. My gf still has another 2-3 years left in school and her dad lives out here so she doesn't want to move anytime soon. She keeps telling me to go but I don't want to lose her. We have been through A LOT and have survived just as much..We've had our problems over the years and have survived a long distance relationship for 2 years before I moved out here. I just don't know what to do. I want to go back to ATL so bad but I don't want to leave her. I am slowly dying inside. I have zero motivation to get up and do anything anymore. I don't know what to do