Do you experience them? If you do, how often and to what extent do they occur? Are they accompanied by any anxiety/distress/dysphoria? Do they affect your mental and physical performance/ability/results?
As for myself, apathy is my constant companion, along with a very strong of isolation from other people and - to a lesser extent - from the external world.
I find it quite difficult to do anything that's not a stable habit. Anyway, If I start something new, I usually give it up after a short time because of my lack of willpower and motivation.
It gets worse if it's something I dislike, or a senseless obligation of some sort. The only thing that can effectively push me to act, in such situations, is serious danger. If there isn't any, I won't do that thing, even though I'm aware it will eventually damage me.
I've had - and I still have - many problems (bad marks and other bad results, for example) because of this tendency of mine.
In addition, I don't usually care very much about what happens around me. It can get really extreme at times - as if nothing mattered at all. In those moments, I wouldn't mind if I died, for example, or if I had no material properties at all. It's a sort of absolute indifference to the external world - as if I didn't belong to it, or I was only a neutral and non-involved spectator.
I also experience anhedonia, even though most of times is only partial - I can still feel something, only it's pretty mild and I can't name it or describe it .
It gets total only when I'm also bored and apathetic.