I'm sorry that you're having such a tough depression. You didn't mention whether you're on meds. My meds seem to keep my depression from being so painful, but it's definitely still there. When I was younger, though, I had some extremely painful depressions while taking meds.

I had never thought of how it might be harder for extroverts to be alone while depressed.

When I'm not depressed, I'm one of those "introverts with good social skills" but when I'm depressed, I mostly revert to being alone. I have a very high tolerance for not minding being alone, which I'm not sure is helpful for me in trying to recover from my depression.

An "Introverts" forum was recently created here - maybe there needs to be an "Extroverts" forum, too.

But, yes, therapy brings up emotional subjects, and if my depression is very bad, I sometimes feel worse afterwards.

On a separate subject, the therapist is supposed to make an effort to give you some emotional "cooling-off" time at the end of the session and to make sure that you feel like you're in a safe place before you leave. You don't want to be right in the middle of talking about something emotionally stressful then suddenly have your session ended.