There is no problem here. You only make it into a problem by thinking it should be different.
As you say, things have not always been this way. This isn’t a disorder or a reflection on you. It is just a bend in the river. Your past experiences are not the goal nor are they the means to orient your future experiences. Let them go, stop trying to get back to them.
Being whole is not a transient experience. Whether you “feel” whole or not, you are whole. It is like believing you are a human. Do you always have to “feel” that you are human in order to know that you are human? The same goes for wholeness. Wholeness is not a specific feeling but a clarity regarding existence.
Forget the universe and others. Forget yourself. Relax into the groundlessness of what you are experiencing. Stop desperately trying to latch onto something familiar so that you can say you are whole and “in a good state” again.
“The bad news is you’re falling through the air, nothing to hang on to, no parachute. The good news is there’s no ground.” ~ Chogyam Trungpa Rinpoche
In the past, we have mistaken our feelings with reality. If we feel connected, then we are really connected. If we feel disconnected, then we must be really disconnected. But the point of the spiritual path is to go beyond that to experiential certainty. You must come to terms with and discover for yourself what it means to be connected or disconnected.
Who can be connected/disconnected with what, when what is who and who is what? Keenly understand the meaning of impermanence and interdependence.
This sort of suspended disinterest you are currently experiencing is a mark of growing detachment. Joy and happiness only ever comes from within ourselves. It doesn’t come from the people or things to which we have assigned enjoyment in the past.
Right now you are transitioning from seeking enjoyment through the repetition of memory and mental states to the sincere revelation of peace within. Don’t resist it but instead roll with it.
Daily meditation will help. I’d also recommend the book The Places That Scare You by Pema Chodron.
Zahra turned 1 today!