Have been asking myself the same question.
Only thing lacking is the depression (did have severe mania once), I am experiencing something new- more flat and lack of energy. Don't like it. I am not an emotional person. (To the extent that my former psychiatrist compared me to a robot)

My 'normal' state is energetic and happy, I don't like this change. I am not really sad, but this state feels a bit sad to be stuck in. Somehow still without 'normal' emotions. I do have emotions, to some degree- they just are different sometimes.

But yeah, I have asked myself the same question. I think you can be depressed without feelings, but I always imagined that would result in total lack of emotions. I am not in a total limbo either, and I try really hard to get out of this thing I'm stuck in.
(Also, it has started to add other things into my state of being, which I really don't like. Not sure if it is because I have been like this for too long and its getting worse, or if it is a coincidence)

Ps: writing on phone, that have a tendency to make me a bit unclear, I don't see all the text at once I always promise myself to check for spelling and understanding, but then never bother.