I've been in therapy for two years now.
And I've been severely depressed for maybe 6 or 7 years.
Therapy hasn't helped with depression I'm sorry to say. It helps with other stuff, it helps me focus on the things I want to change in my life in order to achieve some semblance of happiness. Thank god I have antidepressants or I wouldn't be able to achieve anything.
So meds help.

The apathy and lack of motivation is such a downward spiral because the less you're motivated the less you'll do sth and the worse you'll feel. I've noticed that when I force myself to go outside, do some sports, run errands, anything. It gets better because it feels like I've accomplished something even if it's small;