I am actually fairly qualified to respond to this question, with a Ph.D. in a human services field. Not bragging, but want to let you know that.

You could be depressed, or there could be an underlying issue that you are suppressing. You might want to google "depression screening" or "depression checklist" and take a screening test, see if maybe you are depressed. If so, there are many ways to deal with it other than medication. Counseling can be quite effective. You might also look into St. John's Wort, which is considered safer than pharmaceuticals and is often very effective. Do your own research on it however.

It is also possible that you are tired/exhausted, or have a hormonal imbalance.

It is also possible that you are incredibly compassionate and spiritual, and understand that all life is connected. My mother says she feels deep, even physical empathy with animals and can feel their emotions when they are happy, distressed, scared, in pain, etc. She doesn't have this connection with people, only animals. You may have some form of this. I don't think she feels it with insects, but even if you don't pick up on their thoughts (which are probably pretty primal) you can still feel compassion for them, and that is admirable.

Peace to you and good luck.