It's usually "a good sign" when you're self-aware of your current state and emotional behavior. I'd say seek therapy first, but you might just be going through a down time. You're doing good because you know what's happening to you. Surround yourself with people in your project. I burnt out once and it took me 2 years to recover. I wasn't aware of my emotional state. During these 2 years I almost reached depression. My wife is the one that helped me going back outside, doing normal things. As of today, still looking at the world differently, things aren't that awesome anymore but you learn how to live with these feelings and you just deal with it. One day I hope to be fully recovered.

Seek for help.