If u were able to survive on the pay of the old job then go back. Nothing worse than being unhappy at work.
I made that same mistake recently. I left a job where I had little to no work on most days, my own office, nobody watching the clock and my boss was cool as shyt. A couple of my coworkers became damn near my best friends over the past few years. Me and these nikkas go out all the time.
Now I'm at a job that pays alot more but my boss is a bytch and I constantly have shyt to do. Plus I don't know any of the dudes here and they are all old as fukk, we have nothing in common. And I share a office with a white chick who hasn't spoken to me in the month that I've been here. When I walk in she just stares at me like....
I wish I stayed where I was.