There are many theories about these issues. It could be that you lacked the proper developmental interactions to develop empathy. For instance, if you were unloved as a child and/or your caretakers were abusive, these negative interactions could have disrupted or inhibited your capacity to learn empathy. There are many other possibilities but without a complete and comprehensive examination, yours is a difficult question to answer.
Knowing why you are this way is arguably less important than finding a solution to prevent it from negatively impacting your life. If you can’t feel love and have difficulty interacting with people, then you will struggle with relationships. In addition, you might also hurt someone which could lead to your imprisonment and loss of freedom.
I would recommend counseling. Counselors will not be shocked by your feelings. These are all things they are familiar with. They will know how to help you. Good luck and please take care.
Dr. Kristina Randle