Don't be sad, Justin!

Bieber looked a little down Friday as he went on a coffee run with his bodyguard and WITHOUT wife Hailey. The singer was solo in Laguna Beach as Hails likely had work commitments up in LA.

The singer has been seeking treatment for depression at the Amen Clinic down in O.C., but his real support is Hailey. A source tells us: "Justin just doesn't feel good when he's a lone. He wants Hailey around all the time, but he knows she has to work. Since he's kind of taken a break from music, he feels like he doesn't have any real direction when she's not there. He doesn't know what to do with himself."

Bieber had his bodyguard run interference with the paps yesterday -- something he does only when he's not in a great mood and not feeling like interacting. Our source tells us, "Some people around Justin are worried his too dependent on Hailey and that it might not be the best dynamic."

Still, we think he's making such an effort to work on his mental health and we see him smiling and happy so WE think Justin's on the right track and we wish him well!