Yup. You certainly sound depressed. What you are describing is characteristic of social anhedonia, one of the symptoms of depression. Social anhedonia makes it a struggle to maintain relationships since you don’t enjoy the company of others. You persuade yourself that you don’t care as a “You can’t fire me, I quit” tactic. Since you don’t enjoy being with others, it’s hard to motivate yourself to be involved with them in any way.
I’m also curious about when you stopped your medication. Complicating things further for anyone struggling with depression is that anhedonia is sometimes a side effect of antidepressant medication. It’s important to work closely with your prescriber, seeing him or her regularly to monitor the possibility of such side effects.
You bothered to write to us here at Psych Central. That suggests to me that you have some shred of motivation to get better. The answer to your question regarding what to do is to go to treatment, whether you feel like it or not, whether you think there is any point or not. A combination of close coordination of talk therapy and medication is generally helpful. In your case, I would suggest that you find a practice where the prescriber and therapist work closely together on their cases.
I wish you well.