I can relate to what you are saying and have felt like you do. I also take the same dosage of Wellbutrin, eat healthy, and just got into a yoga routine that I love 3 months ago. I'm even a non-traditional student, but without kids & a relationship, but with a full-time job. My friend circle is small.

But I do go to therapy and that's been a pretty big help to me. My T is a proponent of MCBT, which is something that is a lot more involved than this but can be summarized by: Wherever you go, there you are. In relation to depression, it is kind of like acceptance of your feelings, even if they are crappy, without judgment, without rumination. Like worrying leads to more depression, leads to more worrying, etc. I wasn't a fan of the idea when I first heard it. I thought it was hokey. But it made a difference(along with therapeutic support).