> The problem is that I'm bordering on clinical depression (so my doctor tells me). The reason is that I'm hyper-focused on tech: I'm glued to my iPhone, read HN all day, read books on programming, hack on nights and weekends.

I'm not telling you not to trust your instincts, but be aware that it's really really common for people your age to be diagnosed with clinical depression due to biological/hereditary reasons.