I was/am going through a depressive period, have been since the beginning of December and all it really did was to clarify that I had no one to call to talk to or hang out with.
I'm not sure if this applies to your situation, but the winter months SUCK for me. I'm always more anxious and prone to regression in the winter - I think it has to do with a decrease in sunshine. Come summertime I've got more bounce in my step.
Regardless, the "failed attempts" at integrating weren't failures if you tried. You probably learned a bit about yourself and others in the process, right? That applies to so many things... recipes, business ventures, relationships... I feel like there's only failure if you DON'T put yourself out there. You're sounding damn successful to me .